35results about How to "Reduce self-interference" patented technology

The present disclosure provides methods and apparatuses for multi-carrier transmissions over adjacent channels that reduce self-jamming due to asymmetric interference. In an aspect, a large bandwidth load-base equipment (LBE) carrier may be provided such that CCA is performed jointly over the entire bandwidth. In another aspect, additional CCA timeslots may be used to synchronize the two carriers. In a further aspect, an extended CCA may be performed on a primary unlicensed carrier while a simple CCA may be performed on a secondary unlicensed carrier. In yet another aspect, LBE may be deployed on some carriers while frame-base equipment (FBE) may be deployed on other carriers.

The invention discloses a method for sending information and a method and device for receiving information. The device includes: a channel estimation unit, a channel deviation correction unit, a demodulation and information hard judgment unit, a channel acquisition unit and a time slot delay unit. The method for sending information is as follows: the uplink power control information unit is set to include the pilot information of the first K time slots and the control information of the last L time slots including the power control command word, K and L are positive integers; the sending end sends the uplink Power Control Information Element. The method of receiving information is as follows: the receiving end performs channel estimation based on the pilot information of the previous K time slots, performs channel correction, demodulation and hard judgment processing on the control information of the current time slot, and obtains the actual control information of the current time slot and channel information; after a time slot is delayed, channel estimation is performed according to the obtained channel information. The invention can reduce the power of sending the uplink power control information unit, thereby reducing the self-interference of the system and improving the capacity of the system.

This invention relates to one method to realize code dividing multi-address and time dividing mobile communication by aid of interference eliminator, which comprises the following steps: The basic station making low speed input signals through basic signal processor, codes interference device, address code circuit, gains adjustor processor; making high speed data input signal are processed through basic band signal processor, time dividing merger, series conversion device, impulse range modulator, address codes circuit, time gap gains adjustor; then input them into adder and multi-interference circuit through modulation to send; setting receiving circuit composed of interference at user end.

The embodiment of the invention discloses a method for determining an antenna and a terminal device, relates to the field of communication technology, and can solve the problem of poor transmission performance of the terminal device. The method includes: when the terminal device performs dual connectivity, acquiring a first noise value set, the first noise value set includes noise values ​​between N receiving antennas and M transmitting antennas, and N and M are both positive integers; according to The first noise value set, at least one group of antennas corresponding to the target noise value satisfying the preset condition in the first noise value set is determined as a target antenna group, the preset condition is that the noise value is less than a preset threshold, and the target antenna group is Antennas for a terminal device to perform dual connections, and one set of antennas includes a receiving antenna and a transmitting antenna. The embodiment of the present invention is applied in the process of determining the dual connectivity antenna by the terminal device.

The invention belongs to the technical field of automatic identification, and particularly relates to a label harmonic wave obtaining method for harmonic wave radio frequency identification and a harmonic wave radio frequency identification label. Harmonic waves are generated through a nonlinear device or harmonic waves generated in a nonlinear circuit are extracted from a traditional radio frequency identification label chip and serve as carrier waves used for backscatter modulating. The harmonic waves generated in a prior nonlinear component serve as the carrier waves of a harmonic wave radio frequency identification up link so that the label harmonic wave obtaining method for the harmonic wave radio frequency identification has the advantages that self-infection is as small as that of common harmonic wave radio frequency identification and the harmonic waves are generated without consumption of external power by the label. Therefore, label sensitivity is maintained. According to the label harmonic wave obtaining method for the harmonic wave radio frequency identification and the harmonic wave radio frequency identification label, receiving sensitivity of a reader can be effectively improved and operating distance of a radio frequency identification system is improved.

The embodiments of this specification provide a data transmission delay processing method and system, and a data transmission method and system, which are applied in the technical field of data transmission. Among them, the processing method of data transmission delay includes: taking various factors causing transmission delay as the whole transmission time, obtaining the transmission time of at least two sets of data with different lengths through a simple measurement method, and obtaining the delay relational expression based on the two sets of transmission time , to accurately obtain the delay value in data transmission. Through the processing scheme of the present application, the delay value in transmission can be accurately obtained, so as to carry out precise delay control on transmission, so that time windows are precisely aligned, communication efficiency is improved, and equipment has a long service life.

Embodiments of the present invention provide a method and device for networking base stations in a common frequency band, which relate to the field of communication technologies and can improve the positioning accuracy of a ground base station network. The solution of the embodiment of the present invention includes: according to the communication power of the communication base station to transmit the communication signal and the spreading gain of the spreading code, determine the positioning power of the positioning base station to transmit the positioning signal; then according to the positioning power and the first transmission loss value, determine the cellular network The maximum side length of each honeycomb hexagon in . And according to the positioning power and the second transmission loss value, determine the minimum value of the side length of each cellular hexagon in the cellular network; the positioning base station in each module in the cellular network multiplexes a set of spreading code groups, each module is different The base stations correspond to different spreading codes, and the spreading codes corresponding to the base stations at the corresponding positions of each module are the same; then, from the range between the minimum side length and the maximum side length, a value is selected as the hexagonal value of each cell in the cellular network. The side length of the shape.

The invention relates to an intelligent aerial signal receiving and transmitting method of CDMA high speed data base station, belonging to the mobile communication technical field. The method adopts intelligent aerial technology in base station uplink signal receiving and downlink high speed data transmitting circuit and transmits the signal for the downlink voice user continuously adopts common sector directive aerial technology in the CDMA2000. The invention also relates to a base station uplink signal receiving and transmitting circuit and a downlink high speed data base station signal transmitting circuit, wherein, the uplink signal receiving wave beam figuration circuit can adopt two kinds of wave beam figuration method, namely the baseband wave beam figuration method and the carrierwave beam figuration method; the wave beam figuration method of the downlink signal transmitting can only adopt the carrier wave figuration method. The downlink wave beam figuration weight value can be instantly and directly obtained by the table look-up operation, using the uplink wave reaching direction DOA estimation, without predicting estimation on the downlink independent carrier frequency.

The invention discloses a Massive MIMO FBMC beam space-time encoding downlink transmission method. The method comprises the following steps: performing OQAM modulation, Alamouti block encoding and FBMC modulation on the bit stream information sent to a user to obtain a to-be-sent signal, then performing linear weighting, arriving at different users at different moments by sending channels after different fading, performing FBMC modulation on the received signal by the user, calculating an equivalent channel, performing MMSE channel equalization, and finally performing OQAM demodulation to restore the bit stream information sent by a base station to the user. According to the Massive MIMO FBMC beam space-time encoding downlink transmission method disclosed by the invention, two high-quality techniques, namely Massive MIMO and the FBMC, are combined together, thereby greatly improving the capacity, the energy efficiency and the spectrum effectiveness of the system, eliminating the interference between users, reducing the operation amount, reducing the self interference in FBMC system and improving the bit error rate performance of the system.

The embodiment of the present application discloses an antenna array, including: N antenna units; the wavefront direction of the N antenna units is the same and the lateral spacing between any two is equal; the feeding phase of the N antenna units forms a first arithmetic sequence , the tolerance of the first arithmetic sequence is the preset phase difference; the distance from N antenna elements to the vertical plane in the wavefront direction forms the second arithmetic sequence, and the tolerance of the second arithmetic sequence is the preset distance difference; the preset distance The spatial phase difference between the N antenna elements formed by the difference with respect to the vertical plane cancels the preset phase difference; N is an integer greater than or equal to 2. When the antenna array is applied to the transmitting and receiving channels of the radar system, it can cancel the leakage signal, thereby greatly reducing self-interference, protecting the receiving channel of the radar system, and improving the sensitivity of the radar system. The embodiment of the present application also provides an antenna transceiving system and a radar system.