Dispensing with Channel Estimation: Differentially Modulated Cooperative Wireless Communications

被引：23
作者：
Wang, Li [1 ]
Hanzo, Lajos [2 ]
机构：
[1] Univ Southampton, Sch ECS, Commun Grp, Southampton SO17 1BJ, Hants, England
[2] Univ Southampton, Sch ECS, Chair Telecommun, Southampton SO17 1BJ, Hants, England
来源：
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS | 2012年 / 14卷 / 03期
关键词：
Cooperative communications; amplify-forward relaying; decode-forward relaying; cooperative resource allocation; irregular channel coding; IRCC codes; AF cooperation; DF cooperation; near-capacity communications; channel capacity; wireless system capacity; non-coherent detection; multiple-symbol sphere detection; EXIT charts; wireless system design; GENERALIZED SPHERE DECODER; TIME BLOCK-CODES; RESOURCE-ALLOCATION; CAPACITY THEOREMS; POWER ALLOCATION; FADING CHANNELS; V-BLAST; SPACE; DIVERSITY; TRANSMISSION;
D O I：
10.1109/SURV.2011.081611.00138
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
As a benefit of bypassing the potentially excessive-complexity and yet inaccurate channel estimation, differentially encoded modulation in conjunction with low-complexity non-coherent detection constitutes a viable candidate for user-cooperative systems, where estimating all the links by the relays is unrealistic. In order to stimulate further research on differentially modulated cooperative systems, a number of fundamental challenges encountered in their practical implementations are addressed, including the time-variant-channel-induced performance erosion, flexible cooperative protocol designs, resource allocation as well as its high-spectral-efficiency transceiver design. Our investigations demonstrate the quantitative benefits of cooperative wireless networks both from a pure capacity perspective as well as from a practical system design perspective.
引用
收藏
页码：836 / 857
页数：22
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