基于OFDM-IM的認(rèn)知無線電協(xié)作中繼性能分析

馬千里; 李志明; 楊平; 肖悅

doi:10.11999/JEIT161265

基于OFDM-IM的認(rèn)知無線電協(xié)作中繼性能分析

doi: 10.11999/JEIT161265

1.
(電子科技大學(xué)通信抗干擾技術(shù)國家級重點實驗室成都 611731) ②(東南大學(xué)移動通信國家重點實驗室南京 210096)

基金項目:

國家重點基礎(chǔ)研究發(fā)展計劃(2013CB329001)，國家自然科學(xué)基金(61501095)

計量
- 文章訪問數(shù): 1303
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出版歷程
- 收稿日期: 2016-11-24
- 修回日期: 2017-02-26
- 刊出日期: 2017-08-19

Performance Analysis of OFDM-IM-based Cooperative Relaying Protocol for Cognitive Radio Networks

1.
(National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China)

Funds:

The National Basic Research Program of China (2013CB329001), The National Natural Science Foundation of China (61501095)

摘要

摘要: 該文針對協(xié)作認(rèn)知無線電網(wǎng)絡(luò)場景，提出一種基于索引調(diào)制正交頻分復(fù)用(OFDM-IM)的新型協(xié)作中繼設(shè)計方法。該方法將OFDM-IM技術(shù)應(yīng)用于從用戶發(fā)送端，將從用戶的傳輸空間劃分為信號空間和索引空間。從用戶在其信號空間上轉(zhuǎn)發(fā)主用戶的信息，同時在索引空間傳輸從用戶信息。通過這種方式，主、從用戶之間不存在相互干擾。針對此模型，該文分析了主、從用戶的誤碼率，理論推導(dǎo)了相關(guān)表達(dá)式，并討論了從用戶的位置對主、從用戶性能的影響。仿真結(jié)果表明，該文所提設(shè)計方法能夠同時提升主、從用戶的誤碼率性能，且均優(yōu)于傳統(tǒng)的基于OFDM的協(xié)作中繼方式。
- 認(rèn)知無線電 /
- 協(xié)作中繼 /
- 正交頻分復(fù)用 /
- 索引調(diào)制
Abstract: A novel two time slots Orthogonal Frequency Division Multiplexing-Index Modulation (OFDM-IM)- aided cooperative relaying protocol is proposed for Cooperative Cognitive Radio Networks (CCRN). In the proposed scheme, OFDM-IM technique is used at the Secondary User (SU) to split the transmission space into the signal constellation domain and the index domain. Specifically, the Secondary Transmitter (ST) of SU acts as a Decode-and-Forward (DF) relay to transmit the information of the Primary User (PU) in the signal constellation domain, while the information bits of SU are carried by the index domain. Through this design concept, the mutual interference between the PU and SU can be avoided. Upper bounds on the Bit Error Probabilities (BEPs) of the PU and SU are analytically derived. The influence of STs location to the BER performance of PU and SU is also analysed. Several numerical results and discussions are provided to substantiate the theoretical analysis, and it is shown that the proposed protocol is a viable candidate for OFDM-based CR networks since it can enhance the BER performances of both PU and SU.
- Cognitive Radio (CR) /
- Cooperative relaying /
- Orthogonal Frequency Division Multiplexing (OFDM) /
- Index Modulation (IM)

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參考文獻(xiàn)(17)

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