【摘要】 针对正交频分复用(OFDM)系统在功率放大器(PA)非线性较强时的性能问题,基于一种无线设备非线性与无线信道的联合估计技术,提出了一种基于训练序列的OFDM非线性信道估计与补偿技术。首先基于最小二乘(LS)算法进行发射机非线性与无线信道单位脉冲响应的联合估计,然后依次进行无线信道与发射机非线性的补偿。仿真结果显示,提出方法可逼近不考虑PA非线性时OFDM无线通信系统的完美均衡理论解析值。更多还原

【Abstract】 Aiming at the problem of communication performance of OFDM systems when the Power Amplifier( PA) nonlinearity is strong,and based on a kind of combined estimation technology for nonlinearity of transmitters and wireless channels,a nonlinear channel estimation and equalization technique of OFDM system is proposed based on training sequences. Firstly,the transmitter nonlinearity and unit impulse response of wireless channel are estimated with least squares( LS) algorithm,then the compensation of wireless channel and transmitter nonlinearity are done successively. Simulation results show that the proposed method may approach the result of OFDM wireless communication systems without nonlinearity under the perfect compensation of wireless channel.更多还原