Cooperative diversity system beamforming method and device

Abstract

The invention discloses a cooperative diversity system beamforming method and device. The method includes: dividing a TDMA frame into three subframes, and two user terminals share one subframe for information transmission; determining a TDMA frame according to a relay protocol Signals received and transmitted in three subframes; signals received in different subframes are jointly processed according to the equivalent channel model to determine the final received and transmitted signals; and beamforming of the cooperative diversity system at the user end is completed according to the final received and transmitted signals. Through the technical scheme provided by the invention, the problem of low capacity of the existing cooperative diversity system is solved, and the effect of improving the system capacity is achieved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a beamforming method and device for a cooperative diversity system. Background technique [0002] In the next-generation broadband wireless communication network, how to support a larger bandwidth in the wireless communication network under the bandwidth of the current wireless communication system becomes a key factor in improving the throughput of user terminals between cells and the average throughput of user terminals. Facing severe challenges. [0003] In wireless communication, transmit diversity is an effective technique against multipath fading. However, due to limitations in power, size, cost, and hardware complexity, wireless terminals may only use a single antenna. Therefore, cooperative diversity technology emerges as the times require, and its main idea is to allow multiple single-antenna terminals to form a virtual multi-antenna array to obtain transmit diversit...

AI Technical Summary

Problems solved by technology

[0004] However, generally speaking, the capacity of the current cooperative diversity system is not high, and there are various problems at the same time:

[0005] (1) In the cooperative diversity system, each user can only send information from the quadrature and in-phase components of the PSK modulation system, so only BPSK modulation can be used

[0006] (2) The number of antennas on the base station (BS) and user end (UE) in the cooperative diversity system is limited

[0007] (3) Single relay protocol in cooperative diversity system

[0008] (4) Traditional AF (Amplify-And-Forward, amplify and forward) protocol, DF (Decode-And-Forward, decode and forward) protocol, SDF (Selection Decode and Forward, select decode and forward) protocol in cooperative diversity system cause system performance to degrade

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