This paper introduces generalization of unique word OFDM (orthogonal frequency division multiplexing) signaling scheme to multiple antennas (MIMO). As UW-OFDM represents a virtual massive MIMO system, the quasi-maximum likelihood (ML) detection algorithms initially introduced for massive MIMO systems are adapted to MIMO UW-OFDM. Results show that in an uncoded system MIMO UW-OFDM is able to exceed ML performance of MIMO CP-OFDM. However, the complexity penalty is not negligible. In case of a coded system, ML detected MIMO CP-OFDM still performs better. MIMO UW-OFDM represents a performance/complexity tradeoff between linear and ML detected MIMO CP-OFDM.
展开▼
机译：本文介绍了将唯一字OFDM（正交频分复用）信令方案推广到多天线（MIMO）的方法。由于UW-OFDM代表虚拟的大规模MIMO系统，因此最初为大规模MIMO系统引入的准最大似然（ML）检测算法适用于MIMO UW-OFDM。结果表明，在未编码的系统中，MIMO UW-OFDM能够超过MIMO CP-OFDM的ML性能。但是，复杂度的损失是不可忽略的。在编码系统的情况下，ML检测到的MIMO CP-OFDM仍然表现更好。 MIMO UW-OFDM表示线性检测和ML检测的MIMO CP-OFDM之间的性能/复杂度折衷。
展开▼
