Constructions of Fast-Decodable Distributed Space-Time Codes

Barreal, Amaro; Hollanti, Camilla; Markin, Nadya

doi:10.1007/978-3-319-17296-5_4

Cited by 1 publication

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“…A first framework for constructing NVD codes with reduced decoding complexity was proposed in [1], and explicit examples were given in [1], [2]. In [27], the authors of the present paper constructed the first FD distributed Space-Time (ST) codes for the MIMO channel and provided simulation results illustrating that imposing fast-decodability does not have an adverse effect on the performance of the codes. The constructions are however not general, but rather very specific example codes.…”

Section: A Related Work and Contributionsmentioning

confidence: 99%

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Fast-Decodable Space–Time Codes for the -Relay and Multiple-Access MIMO Channel

Barreal

Hollanti

Markin

2016

IEEE Trans. Wireless Commun.

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In this article, the first general constructions of fast-decodable, more specifically (conditionally) ggroup decodable, space-time block codes for the Nonorthogonal Amplify and Forward (NAF) Multiple-Input Multiple-Output (MIMO) relay channel under the half-duplex constraint are proposed. In this scenario, the source and the intermediate relays used for data amplification are allowed to employ multiple antennas for data transmission and reception. The worst-case decoding complexity of the obtained codes is reduced by up to 75%. In addition to being fast-decodable, the proposed codes achieve full-diversity and have nonvanishing determinants, which has been shown to be useful for achieving the optimal Diversity-Multiplexing Tradeoff (DMT) of the NAF channel.Further, it is shown that the same techniques as in the cooperative scenario can be utilized to achieve fast-decodability for K-user MIMO Multiple-Access Channel (MAC) space-time block codes.The resulting codes in addition exhibit the conditional nonvanishing determinant property which, for its part, has been shown to be useful for achieving the optimal MAC-DMT. Index TermsCentral simple algebras, distributed space-time block codes, fading channels, fast-decodability, lattices, multiple-access channel (MAC), multiple-input multiple-output (MIMO), relay channel.

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Section: A Related Work and Contributionsmentioning

confidence: 99%

“…To the best of the authors' knowledge, we obtain the first distributed ST codes for multiple antennas which are FD and have the NVD property, excluding the example codes in [27].…”

Section: A Related Work and Contributionsmentioning

confidence: 99%