Single-Symbol-Decodable Differential Space-Time Modulation Based on QO-STBC

TL;DR

This paper introduces a novel single-symbol decodable differential space-time modulation scheme based on MDC-QOSTBC, offering full diversity, higher code rate, and lower decoding complexity compared to existing methods.

Contribution

It is the first single-symbol decodable DSTM scheme not based on O-STBC, utilizing MDC-QOSTBC for improved performance and reduced decoding complexity.

Findings

Provides higher code rate than O-STBC-based DSTM

Decoding complexity is significantly lower than Sp(2) and double-symbol QOSTBC schemes

Achieves full transmit diversity with minimal performance trade-offs

Abstract

We present a novel differential space-time modulation (DSTM) scheme that is single-symbol decodable and can provide full transmit diversity. It is the first known singlesymbol- decodable DSTM scheme not based on Orthogonal STBC (O-STBC), and it is constructed based on the recently proposed Minimum-Decoding-Complexity Quasi-Orthogonal Space-Time Block Code (MDC-QOSTBC). We derive the code design criteria and present systematic methodology to find the solution sets. The proposed DSTM scheme can provide higher code rate than DSTM schemes based on O-STBC. Its decoding complexity is also considerably lower than DSTM schemes based on Sp(2) and double-symbol-decodable QOSTBC, with negligible or slight trade-off in decoding error probability performance.