Symbol-level hybrid precoding method for massive MIMO
A precoding, symbol-level technology, applied in the field of symbol-level hybrid precoding for massive MIMO, to achieve the effect of improving system capacity
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[0061] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.
[0062] In the embodiment, consider a downlink system of single-cell multiple-input multiple-output (MIMO), such as figure 1 shown, which contains a N T BS with root antenna, BS equipped with N R A radio frequency (RF) link serves K single-antenna user terminals. The present invention minimizes the maximum symbol error probability (SEP) of the user at the receiving end under the constraints of the transmitting signal power of the transmitter through the hybrid precoding design. Hybrid precoders consist of analog and digital precoders. Compared with digital precoding, analog precoder has constant modulus constraints and discrete phase constraints. In addition, the maximum change rate of its precoding weights may be difficult to match the digital precoder and reach the symbol-level change rate, so it is difficult for the analog...
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