摘要
接收端的高速运动或者载频的偏移,会引起信道的时间选择性衰落.在时变瑞利信道下,如果依然采用A lamouti经典解码方法,就会引起发送天线间互干扰的产生.当接收端采用多接收天线时,情况将变得更为复杂,此时不仅要考虑消除发送天线间互干扰,而且还要保证最有效的利用分集增益.基于单接收天线时的决策反馈解码器和置零解码器,提出2种新的多接收天线下的解码器,称为决策反馈最大比合并解码器(DFMRC)和置零最大比合并解码器(ZFMRC).仿真结果显示,这2种新的解码器表现出消除发送天线间互干扰和利用分集增益的优越性能.
Time-selective Rayleigh fading of channels is caused by Doppler shift and carrier frequency offset. In this situation, the intertransmit antennas interference （ITAI） will arise if Alamouti decoder is used. When multi-received antennas are used, the situation is more complex. So it must be considered that how to remove the ITAI and make use of the diversity gain. Based on the decision feedback decoder and zero-forcing decoder, two new decoders are proposed which are called DFMRC and ZFMRC for space-time block codes using multi-received antennas over time-selective Rayleigh fading channels. The simulation results display the advantages of these two new deceders that eliminate the ITAI and can make full use of diversity gain.
出处
《应用科技》
CAS
2006年第6期5-7,共3页
Applied Science and Technology
基金
哈尔滨工程大学基础研究基金项目(HEUF04103)
