A Novel Single Carrier Space-Time Block-Coded CDMA System with Iterative Receiver
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Space-time codes from structured lattices
IEEE Transactions on Information Theory
Multi-strata codes: space-time block codes with low detection complexity
IEEE Transactions on Communications
Iterative sphere detectors based on the schnorr-euchner enumeration
IEEE Transactions on Wireless Communications
Interlevel-correlated orthogonal space–time block codes based on the expanded signal constellation
Wireless Communications & Mobile Computing
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In this paper, a new technique to design improved high-rate space-time (ST) codes is proposed based on the concept of concatenated ST block code (STBC) and outer trellis-coded modulation (M-TCM) encoder constructions. Unlike the conventional rate-lossy STBC-MTCM schemes, the proposed designs produce higher rate ST codes by expanding the codebook of the inner orthogonal STBC. The classic set partitioning concept is adopted to realize the STBC-MTCM designs with large coding gains. The proposed expanded STBC-MTCM designs for the two-, three-, and four-transmitter cases are illustrated. Simulation results show the proposed STBC-MTCM designs significantly outperform the traditional ST-TCM schemes. Furthermore, decoding complexity of the proposed scheme is low because signal orthogonality is exploited to ease data decoding.