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High‐rate uncoded space‐time labelling diversity with low‐complexity detection
International Journal of Communication Systems ( IF 2.1 ) Pub Date : 2020-07-09 , DOI: 10.1002/dac.4520
Sulaiman Saleem Patel 1 , Tahmid Quazi 2 , Hongjun Xu 2
Affiliation  

Uncoded space‐time labelling diversity (USTLD) is a recent scheme that improved the error performance compared to conventional multiple‐input, multiple‐output systems. Thus far, USTLD has suffered from limited achievable data rates, as the original model uses only two transmit antennas. This motivates for the work in this paper, where the USTLD model is extended to allow for any desired number of transmit antennas. An analytical bound for the average bit error probability of this high‐rate USTLD (HR‐USTLD) system is derived. This expression is verified using the results of Monte Carlo simulations, which show a tight fit in the high signal‐to‐noise ratio region. The increased data rates associated with larger transmit antenna arrays in HR‐USTLD systems come at the cost of increased detection complexity. Therefore, this paper studies the application of low‐complexity detection algorithms based on the popular QR decomposition technique and proposes a new algorithm specifically designed for HR‐USTLD systems. Analysis of this algorithm in terms of accuracy and computational complexity is also provided and benchmarked against maximum‐likelihood detection (MLD). It is shown that the proposed algorithm achieves near‐MLD accuracy, while reducing complexity by 79.75% and 92.53% for the respective 4 × 4 16QAM and 4 × 5 16PSK HR‐USTLD systems investigated.

中文翻译:

具有低复杂度检测的高速率未编码时空标签多样性

与常规的多输入,多输出系统相比,未编码的时空标记分集(USTLD)是一种改进了错误性能的最新方案。到目前为止,由于原始模型仅使用两个发射天线,因此USTLD的可实现数据速率有限。这激励了本文的工作,其中USTLD模型得到扩展,以允许任何所需数量的发射天线。得出了该高速USTLD(HR-USTLD)系统的平均误码率的分析界线。使用蒙特卡洛模拟的结果验证了该表达式,该结果表明在高信噪比区域中紧密匹配。HR-USTLD系统中与更大的发射天线阵列相关的数据速率的增加是以增加检测复杂性为代价的。因此,本文研究了基于流行的QR分解技术的低复杂度检测算法的应用,并提出了一种专为HR-USTLD系统设计的新算法。还提供了该算法在准确性和计算复杂性方面的分析,并以最大似然检测(MLD)为基准。结果表明,所提出的算法可以达到接近MLD的精度,同时分别降低了复杂度分别为79.75%和92.53%。 研究了×  4 16QAM和4  ×  5 16PSK HR‐USTLD系统。
更新日期:2020-07-09
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