中文说明：应用背景采用LS估计算法及迫零检测得到的接收信号；采用LMMSE估计算法及迫零检测得到的接收信号 ；采用低秩LMMSE估计算法及迫零检测得到的接收信号。关键技术本次仿真载频为2GHz，带宽1MHz，子载波数128个，cp为16；子载波间隔为7.8125kHz；一个ofdm符号长度为128us，cp长度为16us；采用16QAM调制方式；最大doppler频率为132Hz；多径信道为5径，功率延迟谱服从负指数分布~exp(-t/trms),trms=(1/4)*cp时长，各径延迟取为delay=[0 2e-6 4e-6 8e-6 12e-6]
English Description：
Application backgroundUsing the LS estimator algorithm and forced zero crossing detection of the received signal; the LMMSE estimation algorithm and forced zero crossing detection received signal & nbsp; the low rank LMMSE estimation algorithm and forced zero crossing detection of the received signal.Key TechnologyThe simulation of carrier frequency of 2GHz, 1MHz bandwidth, sub carrier number 128 CP 16; sub carrier spacing for 7.8125kHz; a OFDM symbol length for 128us, CP length for 16us; using 16QAM modulation; maximum Doppler frequency for 132Hz; multipath channel for diameter, the power delay spectrum obey negative exponential distribution ~exp -t/trms, trms= (1 / 4) *cp. The path delay is delay=[0 2e-6 4e-6 8e-6 12e-6]