【摘要】 研究了多用户CDMA系统在多径衰落信道下的分组空时编码。在发射端将发射天线分组,每组进行独立的空时编码,同时对分组块码进行最优功率分配;在接收端用干扰分组抑制的方法对各子块进行线性处理及最大似然译码。该方法在不增加设备复杂度的基础上提高了系统的分集增益和误码性能。更多还原

【Abstract】 After studying group space-time coding in mutipath and multiuser CDMA systems, a new joint group space-time coding and power control method was proposed. By partitioning antennas into small groups as the transmitter, using individual space-time codes to transmit information from each antenna group, optimizing transmit power, and decoding an individual space-time code with group interference suppression method and ML detecting at the receiver, this method can improve the diversity gain and error performance without increasing receiver complexity.更多还原