利用特征信道分割方法优化MIMO-OFDM系统吞吐量

提出了一种应用自适应调制,优化MIMO OFDM系统吞吐量的新方法———特征信道分割方法。对于一个有M个发射天线及N个接收天线的系统,通过使用子信道的预编码和解码,可以将每个子信道分解成min(M,N)个并行的特征信道。将这些并行的特征信道按照特定的方式分成多个组,每个组内的特征信道被分配相同的速率,从而使信道吞吐量达到最大。仿真结果表明:该方法的吞吐量和误码率性能与理想情况(每个子信道分配不同的速率)基本相同,但是却能大大降低系统的运算复杂度。

Throughput optimization implementation scheme for MIMO-OFDM systems with adaptive rate modulation

A novel implementation scheme for optimizing throughput called eigen channel partition method was proposed using adaptive rate modulation for MIMO-OFDM systems.In this scheme sub-channels precoders and decoders jointly partition each frequency bin into a set of min( M,N ) parallel eigen channels for M transmit and N receive antennas. All the parallel eigen channels are divided into groups with same assigned rate to all the channels within each group in order to maximize system throughput. Simulation results show the computation complexity is greatly reduced and the throughput and BER performance of the proposed scheme closely approaches to those of conventional method or the ideal case on the channel-by-channel basis.