The method is for channel estimation with transmitter (Tx) and receiver (Rx) beam training in an OFDMA HBF system wherein the transmitter and receiver communicate over a channel and each include a plurality of Radio Frequency (RF) chains and an antenna array of antenna elements corresponding to each RF chain, and wherein the transmitter includes an analog beamformer and the receiver includes an analog combiner. The method includes generating a set of orthogonal Tx training beams for the transmitter based upon a number of antenna elements in the transmitter antenna array, and generating a set of orthogonal Rx training beams for the receiver based upon a number of antenna elements in the receiver antenna array. The method includes probing the channel by simultaneously transmitting OFDMA preambles with each RF chain using a different one of the orthogonal Tx training beams and receiving the OFDMA preambles with each of the orthogonal Rx training beams in a scheduling sequence that includes a pairing of each orthogonal Tx training beam with each orthogonal Rx training beam, and performing channel estimation based upon probing feedback results including a channel response between different pairs of the orthogonal Tx training beams and the orthogonal Rx training beams.

This invention presents methods for estimating MU-MIMO channel information using SU-MIMO channel information to choose a modulation and channel coding appropriate for the quality of the MU-MIMO channels, for adaptively selecting MU-MIMO precoding methods based on estimations of a plural of UEs and for compensating hardware impairments in MU-MIMO precoding.

One example may include transmitting data between a client device and a server over a first channel, sending test data on a second channel to identify a transmission rate of the second channel, comparing the transmission rate to a transmission rate threshold, and determining whether to perform bonding of the first channel with the second channel based on the transmission rate of the second channel being greater or less than the transmission rate threshold.

One example may include transmitting data between a client device and a server over a first channel, sending test data on a second channel to identify a transmission rate of the second channel, comparing the transmission rate to a transmission rate threshold, and determining whether to perform bonding of the first channel with the second channel based on the transmission rate of the second channel being greater or less than the transmission rate threshold.

A wireless device comprises a primary antenna, a primary transceiver, one or more secondary antennas and one or more receive diversity chains. The receive diversity chains, in some embodiments, include transceiver capability. The wireless device measures and collects various statistics. Based on the statistics, the wireless device enables or disables one or more of the receive diversity chains with respect to a cellular radio access technology (RAT). A disabled receive diversity chain, in some instances is then powered down. During an interval when a receive diversity chain is disabled, the control logic periodically or on an event-driven basis enables a given receive diversity chain to probe channel quality indicator (CQI) and channel rank values. In some embodiments, a time interval for collecting a portion of the statistics, is adapted or backed off in anticipation of use of the receive diversity chain, based on traffic circumstances.

A wireless communication system, comprising one or several nodes (A) equipped by a wireless radio interface that is adapted for transmitting digital messages modulated in the form of a series of frequency chirps, for example, LoRa-modulated radio signals. The message is received simultaneously by several base stations (C, D, E), and a server (S) is arranged for dividing the frames by the diverse stations and recombining a corrected frame for the intended recipient (B) based on error codes. Advantageously, the base stations being adapt their timing error compensation strategy when the error codes indicate a corruption of the message.

A radio communication system includes a transmitting station, and at least one receiving apparatus. The transmitting station includes a plurality of modulation units configured to modulate a plurality of input data to generate first data signals in units of blocks having a predetermined data length, a subtraction unit configured to calculate, by using information acquired in advance and indicating a communication path response between the transmitting station and the receiving apparatus, information indicating directivity upon transmission of the first data signals of each of the plurality of modulation units, and predetermined information included in an additional signal to be added to a data signal, a delay wave component of the additional signal and subtract the delay wave component calculated, from each of the first data signals of the plurality of modulation units, to generate a plurality of second data signals, a beam forming unit configured to adjust, by using the information indicating directivity, power and a phase upon transmission of each of the plurality of second data signals to generate a plurality of third data signals, a plurality of adding units configured to add the additional signal to each of the plurality of third data signals to generate a plurality of fourth data signals, and a plurality of communication units configured to transmit the plurality of fourth data signals to the receiving apparatus.

With increasingly dense wireless traffic in 5G and 6G networks, the incidence of message faults due to interference is increasing, leading to wasted time and energy on multiple re-transmissions. Disclosed are procedures for assembling a fault-free copy of a message from two corrupted copies. First, measure the modulation quality of each message element. A faulted message element usually has poor modulation quality. Then, select the best message elements from each of the two corrupted copies, and test the merged version against an embedded error-detection code. If the merged copy still fails the test, select each of the message elements that are different in the two faulted copies since they are all suspicious, and test each version with the error-detection code. By recovering a message despite reception errors, another transmission is avoided, saving time and energy, and avoiding contributing yet further to the background noise. Many additional aspects are disclosed.

A method for a communication device with at least one antenna array composed of a plurality of antenna elements, each of the plurality of antenna elements coupled to a corresponding phase shifter of a plurality of phase shifters. The method includes determining an optimized beam forming weight for each of the plurality of phase shifters by maximizing an array gain of the antenna array for each steering angle of a plurality of pre-defined steering angles to generate a set of optimized beam forming weights for each steering angle; and configuring the plurality of phase shifters with the set of optimized beam forming weights for a selected steering angle to perform beam forming in direction of the selected steering angle.

The present invention relates to a method by which a base station transmits a reference signal in a wireless communication system supporting a full-dimension antenna, and a device for the same. Particularly, the method comprises the steps of: transmitting, to a terminal, a channel state information-reference signal (CSI-RS) configuration indicating the number of antenna ports for transmitting a full-dimension antenna association reference signal; transmitting, to the terminal, a CSI-RS for at least one first antenna port among whole antenna ports for the full-dimension antenna; and receiving, from the terminal, channel information on all of the antenna ports on the basis of the at least one first antenna port.