An Error Propagation Free Decode and Forward Scheme for Channel-Unaware Two-Way Relay Networks

被引:2
作者
Bameri, Salime [1 ]
Gohary, Ramy H. [1 ]
机构
[1] Carleton Univ, Dept Syst & Comp Engn, Ottawa, ON K1S 5B6, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Relays; Integrated circuits; Symbols; Decoding; Relay networks (telecommunication); Detectors; Error probability; Amplify and forward; differential signalling; unitary and non-unitary symbols; optimal detector; ML detector; error floor; one-way relay networks; DIFFERENTIAL UNITARY SPACE; LINEAR DISPERSION CODES; PERFORMANCE ANALYSIS; MODULATION; DIVERSITY; SYSTEMS; DESIGN;
D O I
10.1109/TWC.2022.3175028
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper considers channel-unaware two-way relay networks (TWRNs) with a single-antenna decode-and-forward (DF) relay. These networks typically rely on differential signalling which results in error propagation and error floors. To overcome this drawback, we develop a novel differential signalling scheme, which, in contrast with existing ones, does not cause detection errors to propagate from one block to the next. We obtain a union bound on the block error rate (BLER), which shows that the proposed differential method exhibits superior performance to existing schemes, eliminates error floors and results in a BLER that decays as the inverse of the signal-to-noise ratio. Furthermore, the proposed scheme removes the unitarity restriction on the transmitted symbols in conventional differential signalling. Therefore, non-unitary symbols can be used in the differential signalling which provides more degrees of design freedom and better performance. Our numerical results confirm our analytical findings.
引用
收藏
页码:9246 / 9260
页数:15
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