45results about How to "Maximize transfer rate" patented technology

The invention discloses a resource allocation method of a distributed wireless energy and information transmission system. The distributed wireless energy and information transmission system comprisesa computing center, M RRHs, and S user units. The method comprises the following steps: the M RRHs simultaneously send radio frequency signals to charge S users; on an uplink of RRH-user unit, the user units transmit information to the RRHs closest to the user units in a time division multiple access mode by using the energy received on a downlink; and the user information received by the RRHs issent to the computing center in the time division multiple access mode. By adoption of the resource allocation method disclosed by the invention, the system obtains the maximum throughput under the condition of meeting the power constraints of the RRHs and the causal constraints of the computing center, the RRHs and the user units.

The invention discloses a power distribution optimization method suitable for a medium-voltage carrier system. The method comprises the following steps: processing a message sent by a transmitting end to obtain a frequency domain sequence to be subjected to inverse fast Fourier transform; inserting a pilot frequency for fixing the frequency domain sequence; inverse fast Fourier transform is carried out on each code element of the obtained frequency domain sequence to generate time domain data, and the time domain data is sent to a receiving end after being processed; the receiving end processes the received time domain data and then generates a frequency domain sequence; solving the signal-to-noise ratio and the channel gain of the sub-channel according to the pilot frequency information of the transmitting end and the receiving end; and redistributing the power of the system and the bits of the channels by using a water injection algorithm. According to the method, the original water injection algorithm is optimized, the subcarriers with poor quality are screened out, and the transmission bit number of the subcarriers is adjusted based on the specified modulation mode, so that the power allocated to the subcarriers in the system reaches the maximum transmission bit number, the optimal power allocation ratio is obtained, and the transmission rate is maximized on the basis of ensuring the communication success rate.

The invention belongs to the field of mobile communications, and in particular relates to a physical layer service fusion communication transmission technology. The invention provides a robustness transmission design method in physical layer service fusion. The method comprises the steps that pre-processing is carried out; a transmission covariance matrix Q0 of a multicast service and a transmission covariance matrix Qc of a confidential service are determined; a rate domain, the optimal transmission covariance matrix and the optimal confidential service transmission covariance matrix are acquired; and transmission processing is carried out in a sending node. According to the invention, the service quality is ensured; the transmission rate of another service is maximized; and the reachable rate domain in the worst case, namely the largest channel error, is acquired.

A joint resource allocation method for a cognitive relay wireless sensor network belongs to the technical field of wireless communication. In the cognitive relay wireless sensor network based on SWIPT, the sensor subsystem collects energy from the main user signal, and at the same time, it helps to forward the main user signal in exchange for the right to use part of the licensed spectrum to transmit its own signal. The resource allocation method not only jointly optimizes the power split ratio, transmission power allocation and subcarrier allocation of sensor nodes to maximize the throughput of the sensor subsystem, but also takes into account the target rate requirements of the main system. Its advantage is that it can maximize the throughput of the sensor subsystem by rationally utilizing the energy collected by the sensor nodes and rationally deploying sub-carriers, thereby improving system performance.

The invention provides a hybrid duplex relay implementation method based on statistical probability selection. The method is characterized by comprising the following steps of step 1, pre-judging according to system characteristics, and acquiring system parameters; and step 2, selecting a corresponding working mode according to the system parameters, wherein the system is a one-way decoding and forwarding full-duplex relay system. The hybrid duplex relay implementation method based on the statistical probability selection, which is provided by the invention, focuses on maximization of the throughput of the system, and an optimal relay mechanism based on the statistical probability for a one-way full-duplex / half-duplex hybrid relay system is provided. The hybrid duplex relay implementationmethod based on the statistical probability selection adopts a hybrid duplex mechanism, so that the influence caused by residual self-interference in the full-duplex relay system is eliminated, and the transmission rate of the system is maximized. The relay selects the working mode of the system in each working time slot according to a certain probability.

The invention relates to a multiple output Zigbee launcher which comprises a data acquisition module, a first data processing module, a multipath resolver, a second data processing module, a serializer, a channel estimation module and a power distribution module, wherein the data acquisition module, the first data processing module, the multipath resolver and the second data processing module are sequentially connected; and an output end of the channel estimation module is connected into the power distribution module, and an output end of the power distribution module is connected into the second data processing module. According to the multiple output Zigbee launcher, a multiple output mode is adopted, simultaneous transmission in different channels can be carried out, an optimal power distribution mode is adopted, and thus system performance maximization comprising the maximum transmission rate or the maximum sending signal covering is achieved; and at the same time, receiving sensitivity, capacity of resisting disturbance and sending signal resource optimization of a short-haul communication equipment system can also be improved.

The invention discloses a wireless resource allocation method for an uplink channel of a smart substation based on a 5G network. The steps include: 1. Constructing an uplink network environment of a smart substation; 2. Using an adaptive modulation and coding method to calculate the signal-to-noise ratio of nodes in the substation and bit rate; 3. Taking the maximum bit rate of node transmission as the objective function and taking the limiting factors of 5G communication as constraints, a maximum bit rate optimization model with a step-by-step function is established; 4. Using the spectral efficiency approximation function to reconstruct the spectral efficiency , establish an optimal bit rate linear programming model, and allocate optimal modulation and coding schemes and resource blocks for each node in the substation. The invention can support the cooperative resource allocation of the sensor and the inspection robot in the substation, and maximize the transmission rate of the system under the requirement of time delay.

Embodiments of the invention disclose a method and a device for controlling a relay gain in bidirectional full duplex amplifying and forwarding, which are applied to a relay node located between a first source node and a second source node. The method is used for controlling the relay gain of the relay node according to different design targets and comprises the following steps: the first source node is a master node, the second source node is a slave node, and a transmission rate of the first source node needs to be maximized; the transmission rate of the first source node is not equal to the transmission rate of the second source node, and the transmission rate of the source node with a low transmission rate needs to be maximized; and the sum of the transmission rates of the first source node and the second source node needs to be maximized. By adopting the method and the device disclosed by the embodiments of the invention, the end-to-end performance of a bidirectional full duplex system can be improved, and the power consumption of the relay can be reduced.

The invention discloses an online self-adaptive bit and power distribution and code rate selection method for LED visible light communication. Firstly, a data frame correct for CRC check is reversely coded and modulated in an online normal communication process; then, SINR information is estimated by utilizing more accurate EVM; CRC check is carried out; simultaneously, the frame error rate within a certain time period is counted; the corresponding state is judged; then, a coding rate, a sub-carrier modulation strategy and a power distribution strategy are selected through an equivalent SINR and a corresponding algorithm; therefore, self-adaptive adjustment of transmission parameters in the online communication process is realized; and the transmission efficiency and the spectral utilization efficiency are increased. The method disclosed by the invention is adopted in the online normal communication process; therefore, on the premise that the communication reliability and the total transmission power are constant, the transmission rate is maximized; self-adaptive adjustment of the transmission parameters along with channel conditions in the communication process is realized; therefore, the transmission rate is closer to the channel capacity; and the spectral utilization efficiency is increased.

A UAV-to-ground safe transmission power distribution method, the method is to dynamically divide the circular flight trajectory of the UAV into several time slots during the flight process, and in each time slot, regardless of the location of the safe user The lowest transmission power is assigned to both near and far; for other users, the power is allocated according to the distance of their location. In this way, it is ensured that the security user is not eavesdropped, and at the same time, the transmission rate of other users is maximized. In addition, this patent also provides the upper limit of the transmission rate threshold of security users at various relative distance positions, and the linear relationship between the transmission rate of ordinary users and the transmission rate threshold of security users.

The invention discloses a cognitive security transmission method based on joint transmission of wireless information and power, which transmits private information and energy information in a time slot; a cognitive user ST adopts a decoding and forwarding relay protocol in a time slot to assist secure forwarding of authorized users Confidential information, at the same time, the cognitive user SJ uses energy harvesting technology to harvest the RF spectrum signal containing energy in step S1, and then uses the cooperative interference mechanism to assist the authorized user to transmit private information securely; the cognitive user ST uses the remaining time slot T‑t 1 Send the cognitive information to the cognitive receiver SR. Cognitive users can provide assistance for the secure transmission of authorized users' private information, and authorized users can increase part of the spectrum resources for cognitive transmission, so as to achieve a win-win situation for authorized users and cognitive users, thereby adapting to the development needs of the next generation of cognitive radio network security .