【摘要】 研究了将自适应BP网络应用于直接序列码分多址扩频通信的多用户检测 ,先给出了在同步高斯信道下运用三层自适应BP网络解调扩频信号的结构框图 ,然后分析了基于这种网络进行多用户检测的理论依据和实际性能。仿真结果表明 ,无论是抗多址干扰还是抑制远近效应 ,自适应BP神经网络接收机都明显优于传统接收机和BP神经网络接收机 ,其性能非常接近最佳接收机。更多还原

【Abstract】 Three layer adaptive Back propagation networks are employed for demodulation in Synchronous DS CDMA communications.A structure employing three layer adaptive Back Propagation networks is put forward for demodulation of spread spectrum signals in synchronous Gauss channel.The theoretical arguments and practical performance based on the networks are analyzed.The results show that whether the resistance to multiple access interference or the robust to near far effects,the proposed receiver significantly outperforms not only the conventional receiver but also BP networks receiver and is comparable to the optimum receiver.更多还原