| 摘 要: 基于STBC方案，针对MIMO-OFDM系统中小区间干扰问题，研究分析了STBC-MIMO-OFDM系统模型 的抑制干扰性能。在假定信道产生的衰落是准静态，并且信道衰落参数对于接收端是已知的条件下，采用不同调制方式 和不同数目的收发天线，仿真对比分析了该系统模型接收端采用最大似然检测法时的系统误码性能。仿真对比表明：综 合考虑对传输速率和误码性能的要求，调制方式适宜采用QPSK；在抑制干扰性能上，当信噪比较大时，采用3发2收的 STBC-MIMO-OFDM系统优于采用2发2收的STBC-MIMO-OFDM系统。 |
| 关键词: 空时分组编码；多输入多输出；正交频分复用；最大似然检测 |
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中图分类号: TP311
文献标识码: A
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| 基金项目: 教育部“春晖计划”科研项目（Z2014013）；2015年青海省应用基础研究项目（项目编号：2015-ZJ-721）. |
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| Simulation and Analysis on Performance with STBC for MIMO-OFDM System |
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WANG Tao，CHEN Shanji，HU Wenfang1,2
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1.( 1.Qinghai Nationalities University, School of Physics and Electronic Information Engineering, Xining 810007, China;2.
2.The Xining 28th Middle School, Xining 810007, China)
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| Abstract: Based on the STBC scheme,the paper analyzes anti-interference performance of the STBC-MIMO-OFDM system model,aiming to solve the inter-cell interference(ICI)in MIMO-OFDM communication systems.In condition that the fading channel is quasi-static and the fading channel parameters are known to the receiving end,by using different modulation schemes and different amounts of transmitting and receiving antennas,the paper comparatively analyzes the system BER(Bit Error Rate)performances when the receiving end of the system model adopting the ML(Maximum Likelihood)method.The simulation results show that:with full consideration of the transmission rate and BER performance,QPSK modulation method is most suitable.Under the condition of high SNR(Signal Noise Ratio),the STBC-MIMO-OFDM system with 3 transmitting antennas and 2 receiving antennas is better than that with 2 transmitting antennas and 2 receiving antennas in terms of antiinterference performance. |
| Keywords: STBC;MIMO;OFDM;MLD |
