Method for processing beam forming robustness signal on relay end of bi-direction multi-relay system

Abstract

The invention relates to a method for processing a beam forming robustness signal on a relay end of a bi-direction multi-relay system, and the method comprises the following steps that a pair of primary users and a pair of secondary users exchange information through a plurality of relays, all clients transmit a training sequence to the relays, and the relays estimate signal channels to obtain an estimated channel between the client and the relay; the relays transmit the training sequence to the clients, and the client estimates the channel to obtain an estimated channel between the relay and the client; a central processor calculates a precode of the relay end according to the state information of the obtained channel; all clients simultaneously transmit a signal to the relays, and the relays receive the signal; each relay node linearly processes the received signal to obtain a transmission signal of the relay and broadcast the transmission signal to the client; and all clients detect the received signals to obtain estimated transmission signal. Due to the adoption of the method, the channel capacity is increased, the interference on the primary users can be controlled, and the signal-to-noise ratio of the secondary users can be maximized.

Description

technical field [0001] The present invention relates to a signal processing method in the field of wireless communication, in particular to a robust signal processing method for relay terminal beamforming based on probability constraints in a two-way relay system. Background technique [0002] Since the emergence of the concept of cognitive radio, it has been widely concerned by researchers. However, in some cases, direct point-to-point communication is difficult to achieve due to the limitation of transmission range and interference, so relay technology is introduced. [0003] First of all, the researchers focused on the study of one-way relay scenarios. After searching the existing literature, W.Guan and H.Luo, "Joint MMSE Transceiver Design in Non-Regenerative MIMO Relay Systems," IEEE Communications Letters, July 2008 (Joint MMSE Receiver Design in Non-Regenerative MIMO Relay System, IEEE Communications Journal, July 2008), and obtained related research results under un...

AI Technical Summary

Problems solved by technology

[0007] In the prior art, there is not much research on the robust signal processing method to solve the scenario where the primary user and the secondary user perform wireless information interaction through multiple relay nodes respectively.

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