Estimate-and-forward relay transmission method based on unitary space-time modulation
A transmission method and estimated forwarding technology, applied in transmission systems, digital transmission systems, active electrical relay systems, etc., can solve problems such as error propagation
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[0054] The present invention will be described in detail below in conjunction with the drawings:
[0055] The system model of the multi-relay parallel system is as figure 1 Shown. Multi-relay system consists of source node S, destination node D and K parallel relay nodes R 1 ,R 2 ,...,R K constitute. Suppose that the source node is configured with M transmitting antennas, the destination node is configured with N receiving antennas, and each relay node is configured with K R Root antenna. The unitary space-time constellation is generated using a systematic design method based on DFT.
[0056] Taking the kth relay node as an example, the communication block diagram of the multi-antenna relay system based on USTM is as follows: figure 2 Shown.
[0057] In the first stage, the source node sends a unitary space-time symbol to each relay node for communication. At the T×K of the kth relay node R Dimensional receiving matrix R k Can be written as:
[0058] R k = ρ R ...
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