A new non-orthogonal space-time code with low decoding complexity

Previous work on quasi-orthogonal space-time block code (QO-STBC) has been designed to achieve full rate and full diversity gain for four antennas. However this conventional QO-STBC scheme decoding is complex. For achieving more diversity gains, an extended QO-STBC scheme is provided to achieve full diversity with one rate for six antennas. Furthermore, by transforming the detection matrix to an orthogonal one, this novel scheme can achieve a simple linear decoding. Therefore it proposes an extended minimum decoding complexity QO-STBC (MDC-QO-STBC) for six antennas. Due to eliminate the interference from different equivalent channels, the novel extended MDC-QO-STBC scheme improves transmission reliability and linear decoding complex compared with the conventional QO-STBC scheme. At last extensive simulation results are presented to prove the theoretical analysis.

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Orthogonal space time code based partial rank affine projection adaptive filtering algorithm

2014 IEEE International Symposium on Circuits and Systems (ISCAS) ◽

10.1109/iscas.2014.6865354 ◽

2014 ◽

Author(s):

Md. Zulfiquar Ali Bhotto ◽

M. Omair Ahmad ◽

M. N. S. Swamy

Keyword(s):

Adaptive Filtering ◽

Space Time ◽

Time Code ◽

Filtering Algorithm ◽

Affine Projection ◽

Orthogonal Space

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L2 orthogonal space time code for Continuous Phase Modulation

2008 IEEE 9th Workshop on Signal Processing Advances in Wireless Communications ◽

10.1109/spawc.2008.4641638 ◽

2008 ◽

Cited By ~ 7

Author(s):

Matthias Hesse ◽

Jerome Lebrun ◽

Luc Deneire

Keyword(s):

Phase Modulation ◽

Continuous Phase ◽

Space Time ◽

Continuous Phase Modulation ◽

Time Code ◽

Orthogonal Space

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Improved Pair-Wise Detections of Differential Quasi-Orthogonal Space-Time Modulation with Four Transmit Antennas

Electronics ◽

10.3390/electronics10141675 ◽

2021 ◽

Vol 10 (14) ◽

pp. 1675

Author(s):

Hojun Kim ◽

Yulong Shang ◽

Seunghyeon Kim ◽

Taejin Jung

Keyword(s):

Maximum Likelihood ◽

Orthogonal Design ◽

Space Time ◽

Decoding Complexity ◽

Time Modulation ◽

Orthogonal Space ◽

Simulation Results ◽

Improved Performance ◽

Identical Performance ◽

Ml Detection

In this paper, we propose new complex and real pair-wise detection for conventional differential space–time modulations based on quasi-orthogonal design with four transmit antennas for general QAM. Since the new complex and real pair-wise detections allow the independent joint ML detection of two complex and real symbol pairs, respectively, the decoding complexity is the same as or lower than conventional differential detections. Simulation results show that the proposed detections exhibit almost identical performance with an optimum maximum-likelihood receiver, as well as improved performance compared with conventional pair-wise detections, especially for higher modulation order.

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