MIMO-STBC子载波资源分配算法研究

Research of Adaptive OFDMA Based on MIMO-STBC

正交频分多址是一种无线环境下的高速传输技术,适合在多径传播和多普勒频移的无线移动信道中传输高速数据。在对与多天线STBC等效的单发单收模型进行研究的基础上,提出了一种适用于MIMO-STBC系统自适应优化的子载波资源分配算法,将复杂的分集增益指标转换为直观的SNR指标,明确表示出接收机SNR与信道相关矩阵之间的关系。仿真实验表明,该算法进一步提高了频谱效率与系统性能。

Orthogonal Frequency Division Multiple Access （OFDMA） is a kind of high speed transmission technology in wireless communication, which is suit for wireless mobile channels with multi-path and Doppler Shift to transmit high speed data. An equivalent SISO model for MIMO STBC system was introduced, which depicted the relationship between the SNR and the eigenvalues of the correlation channel matrix. Furthermore, an adaptive OFDM access algorithm for multi-users in MIMO-OFDM system was proposed. Simulation results show the adaptive algorithm has optimal performance and high spectrum efficiency.