550 results about "Adaptive switching" patented technology

Apparatus and methods are provided for adaptively determining a handover measurement interval. Power savings are achieved when a mobile terminal in a digital broadcast broadband network does not constantly attempt to measure the signal strength of nearby cells. By determining cell parameters, such as size and carrier frequency, and also determining dynamic information, such as signal strength and mobile speed over time, the time until the next handover measurement is adjusted up or down. When a mobile terminal is moving towards a transmitter in a cell, the handover measurement interval may be lengthened, and when a mobile terminal is moving away from a transmitter, the interval may be shortened.

A behavior control system and a behavior control method for a robot apparatus are disclosed. The behavior control system and the behavior control method for a robot apparatus include a function of adaptively switching between a behavior selection standard, taking into account the own state, required of an autonomous robot, and a behavior selection standard, taking into account the state of a counterpart, responsive to a situation. A behavior selection control system in a robot apparatus includes a situation-dependent behavior layer (SBL), capable of selecting a particular behavior from plural behaviors, and outputting the so selected behavior, and an AL calculating unit 120 for calculating the AL (activation level), indicating the priority of execution of the behaviors, for behavior selection. This AL calculating unit 120 includes a self AL calculating unit 122 and a counterpart AL calculating unit 124 for calculating the self AL and the counterpart AL, and an AL integrating unit 125 for summing the self AL and the counterpart AL with weighting by a parameter used for determining whether emphasis is to be placed on the self state or on the counterpart state, to output an ultimate AL. The counterpart is a subject of interaction of the robot apparatus. The self AL and the counterpart AL indicate the priority of execution of the behavior with the self and with the co8unbterpart as a reference, respectively.

The invention relates to a region-of-interest video encoding and transmitting method which realize multi-channel combination, and belongs to the technical field of the video encoding and transmission. The method adopts the following steps: step one, space down sampling is performed to the panoramic video with high resolution collected by a panoramic camera, and then encoding is performed after video with low resolution is obtained; step two, region-of-interest detection is performed to video with high definition collected by a visible-light camera, and self-adaptive switching is performed to the two channels of video, namely, downsized video and down-sampled video, according to the area and the position of the region-of-interest detection; step three, an an infrared thermal imager is used for performing detection and tracking to interest targets, encoding infrared region-of-interest video with primary low resolution, and adjusting quantization parameter to realize code rate control; step four, the priority of the three channels of video is set, protecting channel encoding for non-uniform channel is performed according to the priority, and the code is multiplexed into one channel of code stream to be sent to the channel for transmission, and code rate distribution of the channel bandwidth is performed according to the priority. The method guarantees precise detection and high quality encoding to the region of interest when ensuring global detection on the complete scene.

Perceptual audio codecs make use of filter banks and MDCT in order to achieve a compact representation of the audio signal, by removing redundancy and irrelevancy from the original audio signal. During quasi-stationary parts of the audio signal a high frequency resolution of the filter bank is advantageous in order to achieve a high coding gain, but this high frequency resolution is coupled to a coarse temporal resolution that becomes a problem during transient signal parts by producing audible pre-echo effects. The invention achieves improved coding / decoding quality by applying on top of the output of a first filter bank a second non-uniform filter bank, i.e. a cascaded MDCT. The inventive codec uses switching to an additional extension filter bank (or multi-resolution filter bank) in order to re-group the time-frequency representation during transient or fast changing audio signal sections. By applying a corresponding switching control, pre-echo effects are avoided and a high coding gain and a low coding delay are achieved.

An antenna multiplexing system and a method of a smart antenna and a Multiple-Input Multiple-Output antenna are provided, wherein the system includes a MIMO antenna array and a smart antenna array, the smart antenna array includes several groups of antenna array elements in which the distance between neighbor antenna array elements is less than or equal to one half of wavelength, and the smart antenna array comprises at least two groups of antenna array elements with the coherence sufficient for the requirement of the MIMO applications. The method includes: in accordance with the type of the data to be transmitted, determining a transmitting mode and processing the data to be transmitted accordingly, and in accordance with the transmitting mode, controlling the MIMO antenna array or smart antenna array, so as to transmitting the data to the mobile terminal. With the premise that the actual coverage of TD-SCDMA system should be further improved, the requirement of higher user throughout could be met, and the MIMO antenna system could satisfy the requirement of the future system evolution. Both of the applications of the MIMO and the smart antenna could be met with the use of the same antenna feeding system, and the adaptive switching of the MIMO and the smart antenna with respect to the user could be achieved.

The invention which relates to an optical instrument and detection imaging technique discloses a large field depth iris image acquisition system and a method based on a plurality of fixed-focus cameras. The system comprises an iris image collecting device and an image recognition device. The method comprises the following steps: respectively imaging the iris by means of the fixed-focus cameras having different imaging object distance ranges and producing a multi-path fixed-focus image results; choosing one or a plurality of multi-path fixed-focus image results through distance measurement or image quality evaluation method; carrying out image processing and identification of chosen qualified iris image data. The invention effectively integrates the imaging ranges of different fixed-focus cameras in the mode of self-adapting switchover, thereby taking advantages of the cameras and at same time removing disadvantages of the cameras, enlarging the integral imaging range of the acquisition system, and improving the feasibility of an iris recognition system. Compared with the prior iris imaging method adopting a zoom camera, the invention has the advantages of low cost, quick and noiseless focusing.

The present invention relates to a new method for enhancement of source coding systems using high-frequency reconstruction. The invention teaches that tonal signals can be classified as either pulse-train-like or non-pulse-train-like. Relying on this classification, significant improvements on the perceived audio quality can be obtained by adaptive switching of transposers. The invention shows that the so-switched transposers must have fundamental differences in their characteristics.

A method of operation of a communication system includes: estimating a channel; calculating a predicted signal within the channel; evaluating a prediction accuracy of the predicted signal; and adjusting a handoff parameter when the prediction accuracy of the predicted signal is within a threshold range for communicating through a mobile station.

The invention discloses an adaptive automatic left sound track and right sound track switching stereo headphone. The adaptive automatic left sound track and right sound track switching stereo headphone comprises an adaptive switching device, wherein the adaptive switching device comprises a position information acquiring device, a memory, a main control chip and an electronic sound track selector switch; the position information acquiring device is assembled in a left headphone body and / or a right headphone body; preset first logic position information of the left headphone body and preset second logic position information of the right headphone body are stored in the memory; the main control chip are respectively connected with the position information acquiring device and the memory electrically; the electronic sound track selector switch is electrically connected with the main control chip; physical position information acquired by a position information sensor is compared to the preset logic position information by the control chip; and the main control chip controls the electronic sound track selector switch, so that a left sound track and a right sound track are switched over, and the left sound track and the right sound track of the stereo headphone can be automatically switched over adaptively.

The invention provides a self-adaptation switching method and a device. The method comprises the following steps: when a high-speed train travels between two adjacent base stations BS1 and BS2, the high-speed train fits signal strength curves of the BS1 and signal strength curves of the BS2 according to signal strength information received by the BS1 and the BS2 and recorded by an empirical data self-adaptation system; intersections of the signal strength curves of the BS1 and the signal strength curves of the BS2 are confirmed, and the intersections are the optimal switching points of the high-speed train between the base stations BS1 and the BS2; and the corresponding position information of the intersections is confirmed, when the high-speed train moves to the corresponding switching areas of the intersections, switching between the base stations BS1 and the BS2 is started at an appropriate switching moment. The self-adaptation switching method and the device can confirm the optimal switching points, switching areas and switching moments.

The invention provides adaptively-switched main and diversity antennas and a communication terminal. The antennas are arranged in the communication terminal, and are characterized by comprising a first distance sensor, a second distance sensor, a first antenna, a second antenna, a first radio frequency switch, a second radio frequency switch, a radio frequency module and a CPU (Central Processing Unit), wherein the radio frequency module further comprises a main antenna interface and a diversity antenna interface; the radio frequency module is connected with the CPU; the CPU is used for judging the shielding situations of the first antenna and the second antenna according to sensing signals of the first distance sensor and the second distance sensor, and setting the switching positions of the first radio frequency switch and the second radio frequency switch according to a preset logic. The presence of the influence of antenna holding is detected through the distance sensors arranged close to a main antenna and a diversity antenna, and the main antenna and the diversity antenna are switched according to the preset logic, so that the performance of the main antenna is ensured, and the performance of a whole antenna system is further ensured.

A method and system, for use with wireless communications systems having a cellular architecture, for achieving near real time reservation of channels in a first cell for servicing call-in-progress handoffs from other cells such that blocked calls originating within a first cell and blocked handoff of calls-in-progress from other cells are held within acceptable levels. The method and system specify that a minimum number of unutilized channels in a first cell be reserved for servicing call-in-progress handoffs. In the event that a request for a call-in-progress handoff from one of the other cells into the first cell cannot be serviced due to a lack of unutilized channels, the specified minimum number of reserved channels is dynamically adjusted upward and the request for a call-in-progress handoff that could not be serviced is enqueued. Enqueued requests are serviced in a first in first out fashion as unutilized channels become available. In the event that a request for a call-in-progress handoff from one of the other cells into the first cell can be serviced without being enqueued, the specified minimum number of reserved channels is dynamically adjusted downward such that a number of unutilized channels sufficient to service requests for handoff of calls-in-progress is dynamically maintained in a fashion that does not unduly restrict requests for call access from mobile subscriber units within the first cell.

The present invention relates to a computational fluid dynamics (CFD) and multi-data sources-based urban real-time global environment estimation method. The method is based on historical data of urban environment monitor stations, global mesoscale meteorological forecast results, national meteorological data, urban major pollutant source data, a urban geographical three-dimensional model and road surface real-time monitor data of a motor vehicle exhaust detection system, CFD is used as a calculation engine, an environment quality mode is adaptively switched according to meteorological information, a multiscale grid discrete urban model is used, a multi-component pollution model is introduced, and a meteorological dry and wet settlement process is considered, so as to establish an urban global air and environment quality real-time estimation method. The urban environment quality estimation method is much better than existing methods in comprehensiveness, accuracy and real-time performance.

The invention provides a method for self-adapted switch between a single-current mode and a double-current mode, which is used in a time division SCDMA (Synchronous Code Division Multiple Access) system, wherein, a self-adapted switch method comprises the following steps: S102, a nodal point B estimates an uplink channel, and evaluates the cross correlation of the spatial channel between two transmitting blocks; S104, under the circumstances that the cross correlation of the spatial channel is higher than a first threshold value, the system switches to the single-current mode, and under the circumstances that the cross correlation of the spatial channel is lower than the first threshold value, the subsequent single-current and double-current throughputs are estimated; S106, a nodal point B estimates the throughputs of the single-current mode and the double-current mode according to an instruction of the channel quality of the instruction of the channel quality of the single-current mode and the double-current mode, and under the circumstances that the throughput of the double-current mode is larger than the throughput of the single-current mode by a second threshold, the system switches to the double-current mode, otherwise the system switches to the single-current mode.

A method of operation of a mobile telecommunication system includes: measuring a measured target power and a measured server power; predicting a future target power and a future server power for a prediction tap number from when the measured target power and the measured server power are measured; computing an estimation error and a prediction error associated with the future target power and the future server power; determining a handoff hysteresis level based on the estimation error and the prediction error; and sending a handoff trigger for transferring a mobile station from a server station to a target station when the future target power minus both the future server power and the handoff hysteresis level is greater than zero.

The present invention discloses an indoor / outdoor seamless positioning system and method. The seamless positioning system comprises a data processing center sub-system, and a Beidou reference station sub-system, an indoor ultra wide band (UWB) positioning sub-system, a Beidou / UWB mobile station sub-system and a system monitoring sub-system which are connected with the data processing center sub-system separately. The data processing center sub-system sends the current position coordinate of a working device which is determined by the Beidou positioning and the UWB positioning to the system monitoring sub-system to display visually, at the same time, calculates the spatial position relation of the working device, the inlet identification point, an outlet identification point and a switching determination identification area according to the current position coordinate of the working device, thereby realizing the bidirectional adaptive switching of the indoor / outdoor combined positioning. Compared with the prior art, the positive effects of the present invention are that by the fusion of the Beidou navigation positioning and a UWB real-time positioning system, the continuous positioning of the indoor / outdoor mechanical devices is realized, thereby realizing the uninterrupted positioning and monitoring of the mechanical devices.

A payload switching architecture for LEO satellite networks minimizes processing and storage requirements of payloads for deployment as small primary or secondary payloads, payloads perform only forwarding functions. Forwarding rules are provisioned in the payloads enabling them to reroute in case of failures or congestion without intervention from a ground station. Configuration rules are provisioned in the payloads enabling them to dynamically establish and remove interplane crosslinks without intervention from a ground station. The central network operations center on the ground computes forwarding rules and configuration rules for payloads and uploads the rules to the payloads.

The invention discloses Kalman filtering, digital phase-locked loop filtering and signal tracking methods and Kalman filtering, digital phase-locked loop filtering and signal tracking devices, and belongs to the field of wireless communication. The signal tracking method comprises the following steps of: processing the received signal to obtain a receiving signal, and extracting a current observed value from the receiving signal, wherein the receiving signal comprises receiving carriers and receiving codes; and judging whether speed, accelerated speed or jerk of a receiver is greater than a preset threshold value, if so, determining that the carrier is positioned in a high dynamic environment, and performing signal tracking by utilizing the Kalman filtering, otherwise, determining that the carrier is positioned in a non-high dynamic environment, and performing signal tracking by utilizing a digital phase-locked loop. The invention also discloses a signal tracking device, a Kalman filtering method, a Kalman filtering device, a digital phase-locked loop filtering method and a digital phase-locked loop filtering device. The provided methods make the receiver adaptively switch a carrier tracking method, reduce the loop error, improve a refresh rate of a positioning result, and fulfill the aim of continuously tracking and locking the signal in a complex dynamic environment.

Systems, devices and methods for adaptive switching in multicast media streams are disclosed herein. In an embodiment, a method for adaptively transmitting content to one or more users based on currently available bandwidth via internet protocol (“IP”) multicast protocol, includes: receiving a first content stream having a plurality of data packets, the first content stream encoded at a first bit rate; receiving a second content stream having a plurality of data packets, the second content stream encoded at a second bit rate, wherein the first bit rate is different than the second bit rate and wherein the first and second content streams represent the same content; transmitting the first content stream to a user; determining that the user could receive the second content stream based on available bandwidth for transmitting data to the user; and transmitting the second content stream to the user.

The invention relates to a multi-source information fusion method based on a factor graph. The multi-source information fusion method aims to realize full-source positioning and navigation without relying on satellite navigation in a complex environment, takes an inertial navigation system as the core, utilizes all available navigation information sources, and performs rapid fusion, optimal configuration and self-adaptive switching on asynchronous heterogeneous sensor information. A factor graph model is constructed by means of recursive Bayesian estimation, the factor graph is broadened by means of a variable node and a factor node of the system after measurement information of different sensors are acquired, state recursion and updating are completed based on a set cost function, and thefactor graph optimization problem is solved through sparse QR decomposition by adopting an increment smoothing method. The multi-source information fusion method effectively solves the time-varying state space problem generated between carrier motion and measurement availability, can calculate a solution of precise navigation according to dynamic changes of a carrying platform, realizes plug-and-play of multiple sensors, and meets the requirements of carriers changing in complex environment and different tasks.

The invention discloses a backward diode / global positioning system (BD / GPS) dual-mode time service-based time synchronization device. In the device, a frequency output pin of a rubidium clock X72 is connected with an input pin of an AND gate; an output pin of the AND gate is connected with an input pin of a complex programmable logic device (CPLD); an output end of a top dead center-general purpose 2 (TDC-GP2) chip of a time interval measuring instrument is connected with a digital signal processor (DSP) through a single program initiation (SPI) port; the DSP is connected with the rubidium clock through an RS232 serial port; an output end of a 1pps signal output by a BD / GPS dual-mode receiver is connected with the TDC-GP2 chip of the time interval measuring instrument; and an RS 232 port of the BD / GPS dual-mode receiver is connected with the DSP. The device has a simple structure and high stability and can adapt to a switchover time service mode; and the cost of the device is reduced, a system structure is simplified and the stability of the device is enhanced without accuracy loss.

To reduce the complexity of the encoding / decoding of pulse positions and / or pulse magnitudes associated with complex combinatorial computations, a method and structure for encoding and decoding of pulse position and / or pulse magnitudes requires fewer computations of these combinatorial functions. Adaptive switching between coding or encoding is performed in accordance with the estimated density of the plurality of occupied positions.

To reduce the complexity of the encoding / decoding of pulse positions and / or pulse magnitudes associated with complex combinatorial computations, a method and structure for encoding and decoding of pulse position and / or pulse magnitudes requires fewer computations of these combinatorial functions. Adaptive switching between coding or encoding is performed in accordance with the estimated density of the plurality of occupied positions.

System and method for providing frequency control to a power converter. The system includes a controller configured to receive a load signal and generate a first control signal. The load signal indicates an output load for a power converter. Additionally, the system includes a signal generator configured to receive the first control signal and generates at least a first output signal. The first output signal is associated with a first signal strength and a first frequency. The first frequency is inversely proportional to a sum of a first time period, a second time period, and a third time period. The first signal strength increases with the time during the first time period, the first signal strength decreases with the time during the second time period, and the first signal strength is constant with respect to the time during the third time period.

Switching-mode power conversion system and method thereof. The system includes a primary winding configured to receive an input voltage and a secondary winding coupled to the primary winding. Additionally, the system includes a compensation component configured to receive the input voltage and generate at least a clock signal based on at least information associated with the input voltage, and a signal generator configured to receive at least the clock signal and generate at least a control signal based on at least information associated with the clock signal. Moreover, the system includes a gate driver configured to receive at least the control signal and generate a drive signal based on at least information associated with the control signal, and a first switch configured to receive the drive signal and affect a first current flowing through the primary winding.

The invention relates to a method for multi-channel self-adaptive switch during terminal communication, in particular relating to a method for self-adaptive switch of a wireless channel and an Ethernet channel. The method comprises: a terminal automatically detects a wireless communication module and an Ethernet physical link channel, automatically judges the parametric model of Ethernet, and switches to the Ethernet channel when detecting that the Ethernet channel is available (or else switches to the wireless channel). The method has the following beneficial effects: the real-time detection of the wireless channel and the Ethernet channel can be realized, the switching is automatically carried out according to detection results, the fast switch actions are realized in the whole process, the self adaptability to two types of network channels is fully realized, and the manual intervention is avoided; and when the Ethernet is available, the Ethernet channel is utilized preferably; because the Ethernet channel is adopted, the network bandwidth can be greatly expanded, the network time delay is reduced, and meanwhile the consideration of flow is ensured to be unnecessary, thereby reducing a great deal of communication cost; and when the Ethernet is not available, the wireless module is started for utilizing the wireless channel for communication, so that the smooth communication between the terminal and a master station can be ensured.

A mobile device tracks a relative pose between a camera and a target using Vision aided Inertial Navigation System (VINS), that includes a contribution from inertial sensor measurements and a contribution from vision based measurements. When the mobile device detects movement of the target, the contribution from the inertial sensor measurements to track the relative pose between the camera and the target is reduced or eliminated. Movement of the target may be detected by comparing vision only measurements from captured images and inertia based measurements to determine if a discrepancy exists indicating that the target has moved. Additionally or alternatively, movement of the target may be detected using projections of feature vectors extracted from captured images.

The invention discloses a self-adaptive switching method of transmission modes by channel statistics status information in a multi-cell cooperative downward system. The switching method comprises the steps: 1) a user confirms a cell service base station by receiving a signal to noise ratio, computes a candidate cooperative factor from the user to the other base stations in a cooperative cell cluster, and confirms the candidate cooperative base station in the cooperative cell cluster; 2) the user estimates channel information from the user to the cell service base station and from the user to the candidate cooperative base station, computes the channel statistics status information, transmits and receives a correlation matrix, and feeds the correlation matrix back to or implicitly feeds the correlation matrix back to each base station, and each base station transmits the channel status information to a central processing unit; and 3) the central processing unit computes a transmission type switching threshold according to the channel status information, and switches between the base station cooperative transmission mode and the base station non-cooperative transmission mode by comparing the receiving signal to noise ratios with the transmission type switching thresholds between the user and the cell service base station.