Unitary Differential Space-Time Modulation with Joint Modulation

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dc.creatorYuen, Chau
dc.creatorGuan, Yong Liang
dc.creatorTjhung, T. T.
dc.date2008-06-20
dc.date.accessioned2026-07-07T09:45:50Z
dc.date.available2026-07-07T09:45:50Z
dc.descriptionWe develop two new designs of unitary differential space-time modulation (DSTM) with low decoding complexity. Their decoder can be separated into a few parallel decoders, each of which has a decoding search space of less than sqrt(N) if the DSTM codebook contains N codewords. Both designs are based on the concept of joint modulation, which means that several information symbols are jointly modulated, unlike the conventional symbol-by-symbol modulation. The first design is based on Orthogonal Space-Time Block Code (O-STBC) with joint constellation constructed from spherical codes. The second design is based on Quasi-Orthogonal Space-Time Block Code (QO-STBC) with specially designed pair-wise constellation sets. Both the proposed unitary DSTM schemes have considerably lower decoding complexity than many prior DSTM schemes, including those based on Group Codes and Sp(2) which generally have a decoding search space of N for a codebook size of N codewords, and much better decoding performance than the existing O-STBC DSTM scheme. Between two designs, the proposed DSTM based on O-STBC generally has better decoding performance, while the proposed DSTM based on QO-STBC has lower decoding complexity when 8 transmit antennas.
dc.identifierhttps://arxiv.org/abs/0806.3320
dc.identifierhttp://arxiv.org/abs/0806.3320
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163328
dc.subjectInformation Theory
dc.titleUnitary Differential Space-Time Modulation with Joint Modulation
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