High data-rate transmission with eigenbeam-space division multiplexing (E-SDM) in a MIMO channel
High data-rate transmission with eigenbeam-space division multiplexing (E-SDM) in a MIMO channel
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在 MIMO 信道中通过特征波束空分复用 (E-SDM) 实现高数据速率传输
DOI：
10.1109/vetecf.2002.1040426
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Keizo Cho
中科院分区：
文献类型：
--
作者：
Kazumi Miyashita;T. Nishimura;T. Ohgane;Y. Ogawa;Yasushi Takatori;Keizo Cho
在多输入多输出系统中，当发射端已知信道状态信息时，通过本征模信道划分和注水功率控制，给出了系统的最优容量。在该本征波束空分复用（E-SDM）中，由于所分配的比特的数量由离散量表示的事实，基于容量的对子流的比特分配不是最佳的。本文提出了一种基于最小化总误比特率（BER）准则为每个子流分配比特和发射功率的方法，并与空分复用（SDM）进行了比较，数值分析了该方法的BER性能。仿真结果表明，在平均误码率为10/sup-3/时，E-SDM比传统的SDM具有约10 dB的增益。
When channel state information is known at a transmitter in multiple-input multiple-output systems, the optimum capacity is given by eigenmode channel division with water-pouring power control. In this eigenbeam-space division multiplexing (E-SDM), bit assignment to substreams based on the capacity is not optimum due to the fact that the number of assigned bits is expressed by a discrete quantity. In the paper, a method to assign both bit and transmit power to each substream based on the criterion minimizing total bit error rate (BER) is developed, and the BER performance is numerically analyzed in comparison to spatial division multiplexing (SDM). The simulation results assuming 5-transmit and 2-receive antennas show that the E-SDM provides about 10 dB gain compared to the conventional SDM at average BER of 10/sup -3/.