Full-Diversity Dispersion Matrices From Algebraic Field Extensions for Differential Spatial Modulation
Full-Diversity Dispersion Matrices From Algebraic Field Extensions for Differential Spatial Modulation
复制标题
DOI：
10.1109/tvt.2016.2536802
复制
发表时间：
2017
影响因子：
6.8
通讯作者：
R. Rajashekar;Naoki Ishikawa;S. Sugiura;K.V.S. Hari;L. Hanzo
中科院分区：
文献类型：
--
作者：
R. Rajashekar;Naoki Ishikawa;S. Sugiura;K.V.S. Hari;L. Hanzo
我们考虑差分空间调制（DSM）工作在块衰落环境中，并提出稀疏酉色散矩阵（DM）使用代数域扩展。建议的DM集是能够利用充分的发射分集，并在现有的计划相比，可以构建具有任意数量的发射天线的系统。更具体地，提出了两种方案：1）基于字段扩展的DSM（FE-DSM），其中每个空时块仅发送单个常规符号;以及2）FE-DSM实现分集-速率折衷（FE-DSM-DR），其中以降低的发送分集增益为代价在每个空时块中发送多个符号。此外，FE-DSM方案分析示出，以实现全发射分集，和这两个建议的计划施加解码的复杂性，这是独立的信号集的大小。从我们的仿真结果中可以看出，所提出的FE-DSM方案与现有的基于DM的DSM（DM-DSM）方案相比没有性能损失，而FE-DSM-DR被观察到在更高的数据速率下比其DM-DSM对应物提供更好的误比特率性能。具体地，在每信道使用2.25和2.75比特的数据速率下，观察到FE-DSM-DR相对于其DM-DSM对应物实现约1和2 dB的信噪比（SNR）增益。
We consider differential spatial modulation (DSM) operating in a block fading environment and propose sparse unitary dispersion matrices (DMs) using algebraic field extensions. The proposed DM sets are capable of exploiting full transmit diversity and, in contrast to the existing schemes, can be constructed for systems having an arbitrary number of transmit antennas. More specifically, two schemes are proposed: 1) field-extension-based DSM (FE-DSM), where only a single conventional symbol is transmitted per space–time block; and 2) FE-DSM striking a diversity–rate tradeoff (FE-DSM-DR), where multiple symbols are transmitted in each space–time block at the cost of a reduced transmit diversity gain. Furthermore, the FE-DSM scheme is analytically shown to achieve full transmit diversity, and both proposed schemes are shown to impose decoding complexity, which is independent of the size of the signal set. It is observed from our simulation results that the proposed FE-DSM scheme suffers no performance loss compared with the existing DM-based DSM (DM-DSM) scheme, whereas FE-DSM-DR is observed to give a better bit-error-ratio performance at higher data rates than its DM-DSM counterpart. Specifically, at data rates of 2.25 and 2.75 bits per channel use, FE-DSM-DR is observed to achieve about 1- and 2-dB signal-to-noise ratio (SNR) gain with respect to its DM-DSM counterpart.