Alcatel Lucent

Shanghai Langbo Communication Technology Company Limited

Spreadtrum Communications (Shanghai) Co., Ltd.

JinHui Chen

Xiaobo Zhang

Dong Sheng Li

Hongwei Yang

Dong Li

Lin Yang

Di Lv

Keying Wu

Lu Wu

Su Huang

Hao Liu

Zhengang Pan

A method and device for wireless communication in a UE and a base station is disclosed. The user equipment receives a first bit block, transmits or receives a first wireless signal on a first time-frequency resource set, and transmits a second wireless signal on a second time-frequency resource set. The user equipment determines to transmit the second wireless signal on the second time-frequency resource set. A second bit field in the first bit block is used to indicate the first time-frequency resource set. A first bit field in the first bit block is used to simultaneously indicate a first spatial parameter group for transmitting the first wireless signal and a second spatial parameter group for transmitting the second wireless signal or a first multiple access signature for generating the second wireless signal. The spatial parameter group information used for scheduling PDSCH or PUSCH is applied to the uplink grant-free transmission.

Method and device for wireless communication in UE and base station

The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE receives a first signaling for indicating a first time-frequency resource pool and a first spatial parameter group and a second signaling for indicating a second spatial parameter group in turn, the first spatial parameter group being associated to the first time-frequency resource pool including a first time-frequency resource set; the UE judges whether the first time-frequency resource set can transmit a radio signal; if so, the UE transmits a first radio signal in the first time-frequency resource set; otherwise, the UE gives up transmitting a radio signal in the first time-frequency resource set; the first spatial parameter group and the second spatial parameter group judge whether the first time-frequency resource set can transmit a radio signal. The disclosure improves efficiency of configured grant uplink transmission.

Method and device in UE and base station for wireless communication

The disclosure provides a method and a device in a User Equipment (UE) and a base station for wireless communication. The UE, in turn, receives first control information, transmits a first and a second radio signal, wherein the first control information is used for indicating a first multiple access signature sequence, the first multiple access signature sequence includes a first and a second multiple access signature in turn, the first multiple access signature is used for generating the first radio signal based on a first bit block, and the second multiple access signature is used for generating the second radio signal based on a second bit block. According to the disclosure, different multiple access signatures are configured on different time-frequency resources for the UE, which reduces interferences or conflicts between uplink communications due to conflicts of multiple access signatures between multiple users or correlations between non-orthogonal multiple access signatures.

Method and device for configuring a waveform at a transmitter are provided. The method includes: receiving at least one input signal, each input signal corresponding to a subcarrier spacing setting; performing IDFT pre-processing to each input signal, the IDFT pre-processing including DFT pre-coding or offset modulation; performing IDFT to each input signal which is subjected to the IDFT pre-processing, the IDFT including an IDFT with parameters including resource mapping and a corresponding IDFT size; performing IDFT post-processing to each input signal which is subjected to the IDFT to obtain at least one output signal, the IDFT post-processing including cyclic extension and time-domain windowing; adding the at least one output signal in time domain; and transmitting the added signal through a corresponding antenna port. Waveforms are configured flexibly according to practical scenarios at the transmitter to determine a most suitable waveform for current scenario, which meets practical requirements of 5G technology.

Method and device for configuring waveform at transmitter

The present invention provides a method for transmitting signals in a transmitter of a filter band multi-carrier system, comprising steps of: modulating data to obtain modulated data; obtaining a to-be-transmitted signal by framing a pilot preamble symbol with the modulated data; transmitting the to-be-transmitted signal; the pilot preamble symbol consisting of preamble elements, wherein the pilot preamble symbol corresponding to each transmit antenna occupies one filter band multi-carrier modulation symbol. The present invention further provides an apparatus for implementing the method, and a method and apparatus for channel estimation corresponding to the method for transmitting signals.

Method and apparatus for filter bank multi-carrier signal transmission and channel estimation

The present invention provides a correlation-matrix feedback method and system for an antenna array. The method comprises steps of: selecting, at a receiving end, a codeword from a predetermined correlation-matrix codebook comprising a plurality of codewords according to a predetermined criterion to represent a correlation matrix to be fed back (); and feeding back an index of the selected codeword in the predetermined correlation-matrix codebook to a transmitting end (); wherein each codeword is a codeword matrix for approximating a correlation matrix of an antenna array at the transmitting end. According to the present invention, it is possible to take good advantage of the characteristics of closely-spaced ULA antennas and spatial correlation thereof, design a corresponding codebook for quantization and feedback, and reduce feedback overhead and computational complexity so as to improve the system performance of a spatial correlation aided system, such as a MIMO system.

Correlation-matrix feedback method and system for antenna array

The present invention provides a precoding method for a cross-polarized antenna array, the cross-polarized antenna array comprising a first group of coplanar polarized antennas and a second group of coplanar polarized antennas, the method comprising the following steps: generating, for at least one layer of data stream, a feedback codebook comprising a plurality of codewords; receiving a selection of the codeword in the feedback codebook; determining a corresponding codeword from the feedback codebook according to the received selection; generating a precoding matrix based on the determined codeword to precode the at least one layer of data stream; wherein each codeword in the feedback codebook comprises a first coefficient portion corresponding to a first group of coplanar polarized antennas and a second coefficient portion corresponding to the second group of coplanar polarized antennas, and there is a complex scaling relation between the coefficients in the first coefficient portion and the second coefficient portion corresponding to the same layer of data stream. Correspondingly, the present invention further provides a precoder for a cross-polarized antenna array.

Precoding method and precoder for cross-polarized antenna array

The invention proposes a technical scheme (called as explicit feedback (used for feeding the information of downlink channels back to a base station at the user terminal of a wireless communication system, and a technical scheme for precoding the data transmitted to the user terminal based on the information of downlink channels feed back by the user terminal in the base station. The user terminal determines an approximately equivalent matrix of the transmission matrix of downlink channel, based on the transmission matrix of downlink channel, the number of downlink data streams, the spatial correlation matrix of multiple transmitting antennas in the base station and a predetermined codebook; then feeds the information concerning the approximately equivalent matrix back to the base station. The base station recovers the approximately equivalent matrix based on the information concerning the approximately equivalent matrix fed back from the user terminal, and precodes the downlink data transmitted to the user terminal by using the approximately equivalent matrix.

Method and device used for feedback of channel information and precoding

A method and apparatus for processing downlink communication and a corresponding assisting method and apparatus are provided. According to an embodiment, a method for assisting a base station in processing downlink communication in a user equipment includes: estimating a downlink channel between the base station and the user equipment; determining a spatial correlation matrix between the base station and the user equipment according to the result of estimating the downlink channel; determining at least one pre-coding vector among a plurality of pre-stored pre-coding vectors based upon the spatial correlation matrix; and notifying the base station about the determined at least one pre-coding vector and spatial correlation matrix. The downlink communication processing disclosed herein improves the performance of a system, improves the average throughput and the throughput of an edge user of the multi-user MIMO system and has a wider applicability scope than the original codebook and feedback mechanism.

Growing community of inventors

Shanghai, China

JinHui Chen