OQAM/OFDM系统离散导频压缩感知信道估计方法

Compressed Sensing Scatter Pilot Channel Estimation of OQAM/OFDM System

针对传统信道估计方法中插值方法会产生误差和降低系统信道估计精度的问题,提出了偏移正交调制的正交频分复用(Offset Quadrature Amplitude Modulation/Orthogonal Frequency Division Multiplexing,OQAM/OFDM)系统的基于压缩感知的离散导频信道估计方法。该方法通过构建基于压缩感知的信道估计模型,将压缩感知技术应用于离散导频信道估计中,对信道的时域脉冲响应进行估计,避免了使用插值方法所带来的误差。仿真结果表明,与传统的离散导频方法相比,该方法在提升信道估计精度的同时能够有效减少导频的开销。

For the problem that the interpolation of the channel method will cause error and degrade performance,this paper proposed a scattered pilot channel estimation method based on compressed sensing theory for Offset Quadrature Amplitude Modulation/Orthogonal Frequency Division Multiplexing(OQAM/OFDM)system.By set up the model of channel estimation method based on compressed sensing theory for OQAM/OFDM system,this method estimated the channel impulse response through the frequency pilot,which avoided the error that interpolation method caused.The simulation results showed that the proposed method could promote the channel estimation performance and reduced the pilot using comparing to traditional interpolation method.