Orthogonal time-frequency air conditioning system symbol detection method combining LMMSE and MRC

The invention relates to an orthogonal time-frequency air conditioning system symbol detection method combining LMMSE and MRC, and belongs to the field of mobile communication. On the basis of an orthogonal time-frequency-space OTFS modulation system, linear minimum mean square error LMMSE detection is firstly carried out in a time domain according to blocks, a detection result is converted to a time delay-Doppler domain according to a column combination to carry out orthogonal amplitude demodulation, then a demodulation result is converted to the time delay-time domain, and the time delay-Doppler domain is subjected to orthogonal amplitude demodulation. And the initial value is used as an initial value of a maximum ratio combination (MRC) detection algorithm in a time delay-time domain, so that the bit error rate performance of the maximum ratio combination detection method is improved. The effectiveness of the method is verified through simulation experiments, and compared with other initialized detection m