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本文提出并分析了一种MIMO-OFDM系统下,考虑相关空间信道的自适应发射方案选择算法。采用比特交织卷积编码,在以下三种发射模式间进行选择:空间复用、空间分集和复用/分集的混合模式。我们通过对MIMO-OFDM系统中采用迫零(ZF)接收机在高信噪比条件下的错误概率的简化分析,得出空间相关的多天线系统下的自适应选择算法,在给定的误码率条件下可获得使频谱利用率最大化的编码速率、调制模式和发射模式,并反馈到发射端,有效改善了系统的性能。
This paper presents and analyzes a MIMO-OFDM system, consider the relevant spatial channel adaptive transmission scheme selection algorithm. Bit interleaving convolutional coding is used to choose between three transmission modes: spatial multiplexing, spatial diversity, and multiplexing / diversity. By simplifying the analysis of the error probability of a zero-forcing (ZF) receiver in MIMO-OFDM system under high signal-to-noise ratio conditions, we get the adaptive selection algorithm in the space-dependent multi-antenna system. The code rate, modulation mode and transmission mode for maximizing the spectrum utilization can be obtained under the bit-rate condition and fed back to the transmitting end, thereby effectively improving the system performance.