The problem of inter symbol interference（ ISI） in wireless communication systems caused by multipath propagation when using high order modulation like M-Q AMis solved. Since the wireless receiver doesn＇t require a ...The problem of inter symbol interference（ ISI） in wireless communication systems caused by multipath propagation when using high order modulation like M-Q AMis solved. Since the wireless receiver doesn＇t require a training sequence,a blind equalization channel is implemented in the receiver to increase the throughput of the system. To improve the performances of both the blind equalizer and the system,a joint receiving mechanismincluding variable step size（ VSS） modified constant modulus algorithms（ MC-MA） and modified decision directed modulus algorithms（ MD DMA） is proposed to ameliorate the convergence speed and mean square error（ MSE） performance and combat the phase error when using high order QAM modulation. The VSS scheme is based on the selection of step size according to the distance between the output of the equalizer and the desired output in the constellation plane. Analysis and simulations showthat the performance of the proposed VSS-MCMA-MD DMA mechanismis better than that of algorithms with a fixed step size. In addition,the MCMA-MDDMA with VSS can performthe phase recovery by itself.展开更多
本文在分析“stop and go”判决引导算法的基础上,提出了一种选取β的方法。该方法保证对不同的信号和信道“stop and go”判决引导(DD)算法都能快速收敛。为了提高“stop and go”DD算法的收敛速度,提出了一种自适应动量“stop and go...本文在分析“stop and go”判决引导算法的基础上,提出了一种选取β的方法。该方法保证对不同的信号和信道“stop and go”判决引导(DD)算法都能快速收敛。为了提高“stop and go”DD算法的收敛速度,提出了一种自适应动量“stop and go”DD算法。该算法比“stop and go”算法的收敛速度更快。展开更多
基金Supported by the National Natural Science Foundation of China(6100201461101129+1 种基金6122700161072050)
文摘The problem of inter symbol interference（ ISI） in wireless communication systems caused by multipath propagation when using high order modulation like M-Q AMis solved. Since the wireless receiver doesn＇t require a training sequence,a blind equalization channel is implemented in the receiver to increase the throughput of the system. To improve the performances of both the blind equalizer and the system,a joint receiving mechanismincluding variable step size（ VSS） modified constant modulus algorithms（ MC-MA） and modified decision directed modulus algorithms（ MD DMA） is proposed to ameliorate the convergence speed and mean square error（ MSE） performance and combat the phase error when using high order QAM modulation. The VSS scheme is based on the selection of step size according to the distance between the output of the equalizer and the desired output in the constellation plane. Analysis and simulations showthat the performance of the proposed VSS-MCMA-MD DMA mechanismis better than that of algorithms with a fixed step size. In addition,the MCMA-MDDMA with VSS can performthe phase recovery by itself.
文摘本文在分析“stop and go”判决引导算法的基础上,提出了一种选取β的方法。该方法保证对不同的信号和信道“stop and go”判决引导(DD)算法都能快速收敛。为了提高“stop and go”DD算法的收敛速度,提出了一种自适应动量“stop and go”DD算法。该算法比“stop and go”算法的收敛速度更快。
