A large-scale uplink transmission method based on beam space

Abstract

The invention discloses a large-scale uplink transmission method based on a beam space. A plurality of antenna base stations are arranged in the center of a cell, and a large number of single-antennaterminals are distributed in the cell and are accessed to a wireless network at the same time. And the base station obtains state information of beam space channels from all terminals to the base station through beam space channel estimation, namely a channel autocorrelation matrix. And the base station divides the terminals into a plurality of clusters according to the obtained information, and designs receivers and transmitting power for all the terminals according to the beam space channel information. In each coherent time, the base station first estimates the channel gain of each terminal, and then all terminals transmit signals to the base station at the same time. And after the base station receives the signal, performing serial interference cancellation based on the beam space on the terminals in the same cluster, and sequentially solving the signals of all the terminals. The invention provides an effective non-orthogonal multi-access method for the Internet of Things with large-scale terminal access and poor computing power of the communication terminal.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a large-scale uplink transmission method based on beam space. Background technique [0002] With the rise and development of the Internet of Things and artificial intelligence, future wireless networks need to support simultaneous access of large-scale wireless terminals. In currently widely used orthogonal multiple access technologies, such as time division multiple access (TDMA), frequency division multiple access (FDMA) and code division multiple access (CDMA), a radio resource block Can only be assigned to one mobile terminal. Due to the scarcity of wireless resources, it is difficult for traditional orthogonal multiple access technology to support simultaneous access of large-scale terminals. In this context, non-orthogonal multiple access technology has been extensively studied and widely considered as one of the key technologies for future broadband wireless communi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex channel estimation and high computational complexity when large-scale terminal access occurs in existing access schemes, and proposes a large-scale uplink transmission method based on beam space, and clustering of terminals , the design of the base station receiver and the allocation of terminal power propose an effective method

Images