射频六端口网络在软件无线电中的应用  

Application of microwave six-port in software radio

作　　者：张兰[1] 王兵[2] 冯科锦[1] 

机构地区：[1]北京科技大学信息工程学院,北京100083 [2]北京卫星信息工程研究所,北京100080

出　　处：《通信学报》2005年第9期79-84,共6页Journal on Communications

摘　　要：对射频六端口网络在射频上直接解调各类调制信号的普遍适用性进行了理论分析,推导了射频六端口网络解调正交调制信号的一般表达式,并对QPSK、16QAM和π/4QPSK三种调制制式使用计算机仿真验证了表达式的正确性;此外,仿真研究了射频六端口性能指标对解调性能的影响,其结果表明对于QPSK调制信号正交电桥0.3dB的幅度不平衡度和3o的相位不平衡度带来的解调性能恶化小于0.5dB。Common formulas of six-port demodulation orthogonal modulation signals was educed. The results of simulation in demodulation QPSK. 16QAM, π/4QPSK modulation signals are well agreement with the theory analysis. Moreover, the influence of the character of 90° hybrid bridge in six-port was studied. For QPSK signal, the result imply demodulation characteristic degrade less 0.5dB when amplitude unbalance is less than 0.3dB and phase unbalance is less than 3°.

关 键 词：射频六端口网络 直接变频接收 软件无线电 

分 类 号：TN92[电子电信—通信与信息系统]