Large-scale mimo linear iterative detection method based on non-ideal channel
A technology of linear iteration and detection method, applied in baseband system, baseband system components, radio transmission system, etc., can solve problems such as failure of detection method and damage to the excellent properties of M-dimensional matrix
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[0033] In a massive MIMO system, generally N>>K (the number N of base station antennas is much greater than the number K of users). Let s denote a signal vector of order K×1, s containing the transmitted symbols generated from K users. Represents the channel response matrix, so the received signal vector at the base station can be expressed as
[0034] y=Hs+n
[0035] where n is an N×1 dimensional additive Gaussian white noise vector whose elements obey
[0036] The multi-user signal detection task of the base station is to estimate the transmitted signal symbol s from the received noise-added signal vector y. H can be obtained through time-domain or frequency-domain pilots. Using the minimum mean square error (MMSE) linear detection theory, the received signal vector is expressed as
[0037]
[0038] in is the output of the received vector y at the receiving end of the matched filter. It can be seen that the estimated value of the transmitted signal vector Can ...
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