Joint-Alphabet Space Time Shift Keying in mm-Wave Non-Orthogonal Multiple Access

IEEE Access

Ibrahim Hemadeh¹  Zunaira Babar¹  Dimitrios Alanis¹  Mohammed El-Hajjar¹  Soon Xin Ng¹  Daryus Chandra¹  Panagiotis Botsinis¹  Hung Viet Nguyen¹  Lajos Hanzo¹ 

[1] School of Electronics and Computer Science, University of Southampton, Southampton, U.K.;

关键词: Computational complexity;    Dürr-Høyer algorithm;    EXIT charts;    Grover’s quantum search algorithm;    interleave division multiple access;    mm-wave;   

DOI  :  10.1109/ACCESS.2017.2736978

来源: DOAJ

【 摘 要 】

Flexible modulation schemes and smart multiple-input multiple-output techniques, as well as low-complexity detectors and preprocessors may become essential for efficiently balancing the bit error ratio performance, throughput, and complexity tradeoff for various application scenarios. Millimeter-Wave systems have a high available bandwidth and the potential to accommodate numerous antennas in a small area, which makes them an attractive candidate for future networks employing spatial modulation and spacetime shift keying (STSK). Non-Orthogonal Multiple Access (NOMA) systems are capable of achieving an increased throughput, by allowing multiple users to share the same resources at the cost of a higher transmission power, or an increased detection (preprocessing) complexity at the receiver (transmitter) of an uplink (downlink) scenario. In this paper, we propose the new concept of joint-alphabet space time shift keying. As an application scenario, we employ it in the context of the uplink of NOMA mm-Wave systems. We demonstrate with the aid of extrinsic information transfer charts that a higher capacity is achievable when compared with STSK, while retaining the attractive flexibility of STSK in terms of its diversity gain and coding rate. Finally, we conceive quantum-assisted detectors for reducing the detection complexity, while attaining a near-optimal performance, when compared with the optimal iterative maximum A posteriori probability detector.

【 授权许可】

Unknown