低精度量化的OTFS系统性能分析OA北大核心

Orthogonal time frequency space(OTFS)is a candidate modulation scheme for the sixth generation mobile communication(6G)to support heterogeneous requirements of next wireless communication systems in high-mobility scenarios.Considering the problems of high hardware cost and power consumption,the authors construct a low-resolution quantized OTFS system and derive a minimum mean square error(MMSE)detection matrix based on b-bit quantization.The input-output relationship of the system is derived using the additive quantization noise model(AQNM),and the bit error rate(BER)and achievable rate performance are evaluated using the MMSE receiver.Numerical results show that 4-bit quantization loses about 1 dB of performance at BER=10-2 and decreases the achievable rate by around 0.98%compared with full-resolution quantization;8-bit quantization achieves achievable rate comparable to full-precision quantization,confirming the validity of the analytical results.