A Full-Rate Full-Diversity 2x2 Space-Time Block Code with Linear Complexity for the Maximum Likelihood Receiver

Bidaki, S. Saleh Hosseini; Talebi, Siamak; Shahabinejad, Mostafa

doi:10.1109/lcomm.2011.061011.110887

Cited by 15 publications

(8 citation statements)

References 13 publications

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“…, are considered as belonging to a larger codebook χ χ χ. For full diversity to be preserved, the codeword difference matrix between any two distinct codewords from χ χ χ must be full rank [16]. Consider X i , X j ∈ χ χ χ, where X i ∈ χ χ χ 0 and X j ∈ χ χ χ 1 .…”

Section: Analysis Of Diversitymentioning

confidence: 99%

Bandwidth Efficiency Improvement for Differential Alamouti Space-Time Block Codes Using M-QAM

Dlodlo

Pillay

2018

SAIEE Afr. Res. J.

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We propose a technique that enhances the bandwidth efficiency of the two transmit antenna differential space-time block code (DSTBC) by use of space-time block code (STBC) expansion and trellis coding. STBC expansion is realized by expanding the conventional Alamouti STBC using unitary matrix transformation. This is followed by trellis code-aided mapping of additional bits to space-time codes of the expanded set. Trellis code-aided mapping of additional bits enhances the bandwidth efficiency of the proposed DSTBC scheme. The proposed scheme sends more information bits in each transmitted space-time code than the conventional differential detection-aided DSTBC (CDD-DSTBC) scheme, and yet retains the same error performance. For each additional bit sent with the transmitted space-time codeword, the proposed scheme using 16QAM achieves a 12.5% increase in bandwidth efficiency, while the scheme using 64QAM realises an 8.3% increase. Simulation results demonstrate that the error performance of the proposed scheme tightly matches that of CDD-DSTBC with improvement in bandwidth efficiency. The bandwidth efficiency is enhanced at the expense of a moderate increase of the computational complexity at the receiver.

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Section: Analysis Of Diversitymentioning

confidence: 99%

Bandwidth Efficiency Improvement for Differential Alamouti Space-Time Block Codes Using M-QAM

Dlodlo

Pillay

2018

SAIEE Afr. Res. J.

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“…1. The proposed system estimates blocks of multiple-antenna channels by employing either the conventional LS or LMMSE estimator described in (4) and 5, respectively. Both estimators use pilot symbols from all transmit antennas.…”

Section: Derivation Of Channelsĥ 12 Andĥ 22mentioning

confidence: 99%

“…Multiple-antenna systems have been actively researched in recent years for implementation in current and future high-speed wireless communication systems. Space-time block coding (STBC) [1][2][3][4], space-time trellis coding (STTC) [5][6][7] and Bell Laboratories layered space-time (BLAST) [8][9][10] schemes are some of the most promising multiple-antenna schemes because of their capability to provide significant performance improvement when compared with single-input single-output (SISO) systems. However, these schemes require perfect channel knowledge at the receiver, which is unattainable in practical systems.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth efficient power‐aided semi‐blind channel estimation for multiple‐antenna systems

Halmi

Alias

Chuah

2013

IET signal process.

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This study presents a semi-blind channel estimation scheme for multiple-antenna systems. With the aid of channel covariance and received signal power, the proposed scheme derives channel estimates using pilot symbols transmitted by only one of its antennas. Other transmit antennas in the scheme do not need to transmit any pilot symbols. As such, the proposed scheme has higher bandwidth efficiency compared with conventional pilot symbol-based multiple-antenna channel estimation schemes, where every antenna is required to transmit pilot symbols. It is shown that the proposed scheme is able to deliver performance on par with the conventional minimum mean-square error and least-square error multiple-channel estimation schemes. The strength of the proposed scheme lies in its ability to exploit received signal power for channel estimation.

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“…In [18], a full-rate full-diversity 2 × 2 STBC was proposed whose detection complexity scaled quadratically with the cardinality of the signal constellation. A full-rate linear receiver (FRLR) 2 × 2 STBC was introduced in [8] which demonstrates satisfactory performance only for binary phase shift keying (BPSK) and Quadrature Amplitude Modulation-4 (QAM) constellations. Higher order modulation support is essential for attaining higher spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

Towards Higher Spectral Efficiency: Rate-2 Full-Diversity Complex Space-Time Block Codes

Jagannath¹,

Jagannath²,

Drozd³

2019

2019 IEEE Global Communications Conference (GLOBECOM)

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The upcoming 5G (5 th Generation) networks demand high-speed and high spectral-efficiency communications to keep up with the proliferating traffic demands. To this end, Massive multiple-input multiple-output (MIMO) techniques have gained significant traction owing to its ability to achieve these without increasing bandwidth or density of base stations. The preexisting space-time block code (STBC) designs cannot achieve a rate of more than 1 for more than two transmit antennas while preserving the orthogonality and full diversity conditions.In this paper, we present Jagannath codes -a novel complex modulation STBC, that achieves a very high rate of 2 for three and four transmit antennas. The presented designs achieve full diversity and overcome the previously achieved rates with the three and four antenna MIMO systems. We present a detailed account of the code construction of the proposed designs, orthogonality and full diversity analysis, transceiver model and conditional maximum likelihood (ML) decoding. In an effort to showcase the improvement achieved with the presented designs, we compare the rates and delays of some of the known STBCs with the proposed designs. The effective spectral efficiency and coding gain of the presented designs are compared to the Asymmetric Coordinate Interleaved design (ACIOD) and Jafarkhani code. We presented an effective spectral efficiency improvement by a factor of 2 with the proposed Jagannath codes. Owing to the full diversity of the presented designs, we demonstrate significant coding gains ( 6 dB and 12 dB) with the proposed designs.

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A Full-Rate Full-Diversity 2x2 Space-Time Block Code with Linear Complexity for the Maximum Likelihood Receiver

Cited by 15 publications

References 13 publications

Bandwidth Efficiency Improvement for Differential Alamouti Space-Time Block Codes Using M-QAM

Bandwidth Efficiency Improvement for Differential Alamouti Space-Time Block Codes Using M-QAM

Bandwidth efficient power‐aided semi‐blind channel estimation for multiple‐antenna systems

Towards Higher Spectral Efficiency: Rate-2 Full-Diversity Complex Space-Time Block Codes

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