摘要
无线信号在复杂无线信道中传播会产生多径衰落,利用分集接收技术,即在若干支路上接收相关性很小的载有同一消息的信号,通过合并技术将各信号合并输出,能达到在接收端大大降低深衰落概率的目的。最大比合并分集是效果很好的一种。提出了基于OFDM系统的两分集最大比合并的硬件实现方案及其改进方案。
Multi-path fading is faced when wireless signal spreads in complicated wireless channel. Utilizing diversity reception, namely, to receive the signal which is loaded with the same news with little correlation on several branch roads, then exports composed signal through combining technology, for improving the deep fading probability at the end of receiving station. The maximal ratio combining is better than other diversity technology. This paper presents the pra-ctical two-branch transmit diversity scheme and its improved one to realize on FPGA in OFDM system.
出处
《信息技术》
2009年第5期103-106,共4页
Information Technology
