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首页> 外文期刊>Eurasip Journal on Wireless Communications and Networking >Cognitive decode-and-forward relaying with successive interference cancelation
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Cognitive decode-and-forward relaying with successive interference cancelation

机译：具有连续干扰取消的认知解码和前进中继

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Abstract In this work, we study the cognitive decode-and-forward (DF) relaying, where a primary user (PU) communicates with an access point (AP), and in the same geographical region, a secondary source (SS) communicates to a secondary destination (SD) with assistance from a secondary relay (SR). Either SR or SD can decode the secondary data directly (DIR) or using the successive interference cancelation (SIC) technique. Based on the decoding methods of SR and SD, we proposed SR-DIR-SD-DIR, SR-DIR-SD-SIC, SR-SIC-SD-DIR, and SR-SIC-SD-SIC-based cognitive DF relaying schemes. The outage probabilities of both primary and secondary systems are analyzed for all the decoding manners. The transmit powers of SS and SR are further determined to minimize the outage probability of secondary system subject to the constraint that the outage performance loss of primary system should not exceed a certain percentage compared with the stand-alone primary network without spectrum sharing. Numerical results show that by using the SIC decoding, the outage probability of secondary system can be greatly decreased, especially when the interference from PU is strong or the transmission rate of primary data is low.
机译：摘要在这项工作中，我们研究了认知解码和前进（DF）中继，其中主用户（PU）与接入点（AP）通信，并且在同一地理区域中，辅助源（SS）通信具有来自二级继电器（SR）的辅助的辅助目的地（SD）。 SR或SD可以直接解码辅助数据（DIR）或使用连续的干扰消除（SIC）技术。基于SR和SD的解码方法，我们提出了SR-DIR-SD-DIR，SR-DIR-SD-SIC，SR-SIC-SD-DIR和SR-SIC-SD-SIC的认知DF中继方案。针对所有解码方式分析了主要和二级系统的中断概率。进一步确定SS和SR的发射功率，以最小化辅助系统的阻碍概率，其限制主系统的中断性能损失与无频谱共享的独立主网络相比不应超过一定百分比。数值结果表明，通过使用SIC解码，可以大大降低二次系统的停电概率，特别是当来自PU的干扰强或主要数据的传输速率低时。

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