A Distributed Differential Space-Time Coding Scheme With Analog Network Coding in Two-Way Relay Networks
Qiang Huo, Lingyang Song, Yonghui Li, Bingli Jiao
TL;DR
This paper proposes a distributed differential space-time coding scheme with analog network coding for two-way relay networks, analyzing its error performance and optimizing power allocation to enhance system reliability.
Contribution
It introduces a novel DDSTC-ANC scheme with blind estimation and differential detection, along with analytical performance analysis and optimal power allocation strategies.
Findings
Derived exact and simplified PEP expressions.
Optimized power allocation improves system performance.
Simulation results confirm analytical predictions.
Abstract
In this paper, we consider general two-way relay networks (TWRNs) with two source and N relay nodes. A distributed differential space time coding with analog network coding (DDSTC-ANC) scheme is proposed. A simple blind estimation and a differential signal detector are developed to recover the desired signal at each source. The pairwise error probability (PEP) and block error rate (BLER) of the DDSTC-ANC scheme are analyzed. Exact and simplified PEP expressions are derived. To improve the system performance, the optimum power allocation (OPA) between the source and relay nodes is determined based on the simplified PEP expression. The analytical results are verified through simulations.
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