短參考多用戶差分混沌移位鍵控通信系統(tǒng)性能分析

賀利芳; 陳俊; 張?zhí)祢U

doi:10.11999/JEIT190117

短參考多用戶差分混沌移位鍵控通信系統(tǒng)性能分析

doi: 10.11999/JEIT190117 cstr: 32379.14.JEIT190117

重慶郵電大學(xué)通信與信息工程學(xué)院重慶 400065

基金項(xiàng)目: 國(guó)家自然科學(xué)基金(61771085, 61371164)，信號(hào)與信息處理重慶市市級(jí)重點(diǎn)實(shí)驗(yàn)室建設(shè)項(xiàng)目(CSTC2009CA2003)，重慶市教育委員會(huì)科研項(xiàng)目(KJ1600429)

詳細(xì)信息

作者簡(jiǎn)介:
賀利芳：女，1979年生，碩士，副教授，研究方向?yàn)榛煦绫Ｃ芡ㄐ?，微弱信?hào)檢測(cè)

陳俊：男，1993年生，碩士生，研究方向?yàn)榛煦绫Ｃ芡ㄐ?/p>
張?zhí)祢U：男，1971年生，博士后，教授，研究方向?yàn)閿U(kuò)頻信號(hào)的盲處理、語(yǔ)音信號(hào)處理、神經(jīng)網(wǎng)絡(luò)實(shí)現(xiàn)以及信號(hào)的同步處理

通訊作者:
陳俊　945916163@qq.com

中圖分類(lèi)號(hào): TN911.3
計(jì)量
- 文章訪問(wèn)數(shù): 1961
- HTML全文瀏覽量: 800
- PDF下載量: 76
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2019-02-27
- 修回日期: 2020-01-08
- 網(wǎng)絡(luò)出版日期: 2020-07-02
- 刊出日期: 2020-08-18

Performance Analysis of Short Reference Multi-User Differential Chaos Shift Keying Communication System

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Funds: The National Natural Science Foundation of China (61771085, 61371164), The Project of Key Laboratory of Signal and Information Processing of Chongqing (CSTC2009CA2003), The Research Project of Chongqing Educational Commission (KJ1600429)

摘要

摘要:
短參考差分混沌移位鍵控(SR-DCSK)系統(tǒng)主要的缺陷是數(shù)據(jù)傳輸速率較低。為此，該文提出一種短參考多用戶差分混沌移位鍵控(SR-MUDCSK) 通信方案。利用Walsh碼的正交性傳輸多個(gè)用戶的信息，有效提高了數(shù)據(jù)傳輸速率。在AWGN和多徑Rayleigh衰落信道環(huán)境下，對(duì)其誤碼性能進(jìn)行了理論分析，并進(jìn)行了實(shí)驗(yàn)仿真。結(jié)果表明：該系統(tǒng)在傳輸速率方面有較大提升，且能量效率也得到了顯著改善，因此其具有重要應(yīng)用價(jià)值。
- 短參考多用戶差分混沌移位鍵控通信系統(tǒng) /
- 短參考差分混沌移位鍵控 /
- Walsh碼 /
- 傳輸速率 /
- 誤碼率
Abstract:
The major drawback of Short Reference Differential Chaos Shift Keying (SR-DCSK) system is the low data transmission rate. To solve the problem, a Short Reference Multi-User Differential Chaos Shift Keying (SR-MUDCSK) communication scheme is proposed. The orthogonality of Walsh code is used to transmit the information of multiple users, which effectively improves the data transmission rate. The theoretical Bit Error Rate (BER) performance is analyzed, and experimental simulation is carried out under AWGN and multipath Rayleigh fading channel environment, respectively. The results show that the system has a significant improvement in transmission rate, and the energy efficiency is also significantly improved. Therefore, it is of great value in application.

HTML全文

圖 1 SR-DCSK系統(tǒng)框圖

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圖 2 SR-MUDCSK系統(tǒng)框圖

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圖 3 兩徑Rayleigh衰落信道模型

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圖 4 $R$取值不同時(shí)，系統(tǒng)誤碼率的實(shí)驗(yàn)值和理論值隨信噪比變化的曲線

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圖 5 用戶數(shù)$N$不同時(shí)，系統(tǒng)誤碼率隨信噪比變化的曲線

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圖 6 信噪比${{{E_{\rm b}}} / {{N_0}}}$不同時(shí)，系統(tǒng)誤碼率隨用戶數(shù)$N$變化的曲線

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圖 7 用戶數(shù)$N$為2, 4時(shí)，SR-MUDCSK系統(tǒng)與SRMR-DCSK系統(tǒng)誤碼率的對(duì)比曲線

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圖 8 SR-MUDCSK系統(tǒng)在兩種情況下誤碼率的實(shí)驗(yàn)值和理論值能隨E_b/N₀變化的曲線

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圖 9 SR-MUDCSK系統(tǒng)與SRMR-DCSK系統(tǒng)在兩種情況下誤碼率的對(duì)比曲線

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表 1 幾種系統(tǒng)的能量效率和數(shù)據(jù)傳輸速率

系統(tǒng)名稱(chēng)	能量效率(${E_\eta }$)	傳輸速率(${R_{\rm{B}}}$)
DCSK	${1 / 2}$	${1 / {2\beta }}$
SR-DCSK	${P / {(1 + P)}}$	${1 / {(R + PR)}}$
SR-MUDCSK	${{PN} / {(1 + PN)}}$	${N / {(R + PR)}}$

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