基于干擾信號帶外分量卷積反演的鄰道干擾抑制

霍曉磊; 趙宏志; 劉穎; 李曉輝; 王欣; 唐友喜

doi:10.11999/JEIT190704

基于干擾信號帶外分量卷積反演的鄰道干擾抑制

doi: 10.11999/JEIT190704

霍曉磊^{1, 2},
趙宏志^1, ,,
劉穎¹,
李曉輝²,
王欣²,
唐友喜¹

1.
電子科技大學(xué)通信抗干擾技術(shù)國家級重點(diǎn)實(shí)驗(yàn)室成都 611731
2.
陸軍工程大學(xué)石家莊校區(qū)電子與光學(xué)工程系石家莊 050003

基金項(xiàng)目: 國家自然科學(xué)基金(61771107, 61701075, 61601064, 61531009)，國家重點(diǎn)研發(fā)計(jì)劃(2018YFB1801903)，四川科技計(jì)劃(2019JDRC0006)

詳細(xì)信息

作者簡介:
霍曉磊：男，1980年生，博士生，主要研究方向?yàn)闊o線信號處理、通信抗干擾技術(shù)

趙宏志：男，1978年生，教授，博士生導(dǎo)師，主要研究方向?yàn)橥ㄐ趴垢蓴_技術(shù)、并行化信號處理

劉穎：男，1985年生，講師，主要研究方向?yàn)閿?shù)字預(yù)失真、無線信號處理

李曉輝：男，1978年生，講師，主要研究方向?yàn)闊o線通信技術(shù)、指揮控制系統(tǒng)

王欣：女，1983年生，講師，主要研究方向?yàn)橹笓]控制系統(tǒng)、通信抗干擾技術(shù)

唐友喜：男，1964年生，教授，博士生導(dǎo)師，主要研究方向?yàn)樾盘柼幚?、傳感器網(wǎng)絡(luò)

通訊作者:
趙宏志　lyn@uestc.edu.cn

中圖分類號: TN92
計(jì)量
- 文章訪問數(shù): 3512
- HTML全文瀏覽量: 970
- PDF下載量: 99
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2019-09-10
- 修回日期: 2020-02-28
- 網(wǎng)絡(luò)出版日期: 2020-04-07
- 刊出日期: 2020-10-13

Adjacent Channel Interference Suppression Based on Deconvolution of Interference Signal’s Out-of-band Component

1.
National key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China
2.
Department of Electronic and Optical Engineering, Shijiazhuang Campus of Army Engineering University, Shijiazhuang 050003, China

Funds: The National Natural Science Foundation of China (61771107, 61701075, 61601064, 61531009), The National Key R&D Program of China (2018YFB1801903), Sichuan Science and Technology Program (2019JDRC0006)

摘要

摘要: 鄰道干擾(ACI)抑制中需要獲取干擾信號非線性特征進(jìn)行信號重建與抵消，因此接收機(jī)需使用高速率寬帶模數(shù)轉(zhuǎn)換器(ADC)采集干擾信號，這將大幅增加接收機(jī)成本。針對上述問題，該文提出一種采用干擾信號帶外分量卷積反演的鄰道干擾抑制方法，利用接收的干擾信號帶外非線性分量，計(jì)算并消除相鄰幀之間的影響，由窄帶部分卷積信號幀構(gòu)造出線性卷積信號幀，然后用正則化最小二乘方法恢復(fù)原始非線性寬帶干擾信號，從而降低ADC采樣率。仿真驗(yàn)證結(jié)果表明當(dāng)采樣率僅為傳統(tǒng)方案1/3，所提方法帶來的殘余干擾不高于底噪6 dB。
- 無線通信 /
- 鄰道干擾 /
- 干擾抑制 /
- 卷積反演 /
- 信號恢復(fù)
Abstract: In Adjacent Channel Interference (ACI) suppression, in order to obtain the nonlinear characteristics of interference signal for reconstruction and cancellation, the receiver needs to use high-sampling-rate wideband Analog-to-Digital Converter (ADC) to sample interference signal, which will greatly increase the cost of the receiver. To solve the problem, a ACI suppression method based on deconvolution of interference signal’s out-of-band component is proposed in this paper. By using the known out-of-band nonlinear component, the influence between adjacent frames is calculated and eliminated, and then the narrow band linear convolution frame is constructed from the partial convolution frame. Finally, the original wide band signal is recovered by regularized least square method, thus reducing the ADC sampling rate. The simulation results show that when the sampling rate is only 1/3 of the traditional scheme, the residual interference brought by the proposed method is not higher than the noise floor of 6 dB.
- Wireless communication /
- Adjacent Channel Interference (ACI) /
- Interference suppression /
- Deconvolution /
- Signal recovery

HTML全文

圖 1 卷積反演架構(gòu)鄰道干擾抑制接收機(jī)

下載: 全尺寸圖片幻燈片

圖 2 卷積反演電路框圖

下載: 全尺寸圖片幻燈片

圖 3 卷積反演信號頻譜示意圖

下載: 全尺寸圖片幻燈片

圖 4 輸入鄰道干擾INR同信號恢復(fù)誤差的關(guān)系

下載: 全尺寸圖片幻燈片

圖 5 INR為40 dB時(shí)反演信號及殘余干擾頻譜

下載: 全尺寸圖片幻燈片

圖 6 INR為60 dB時(shí)反演信號及殘余干擾頻譜

下載: 全尺寸圖片幻燈片

圖 7 接收信號INR同鄰道干擾抑制能力關(guān)系

下載: 全尺寸圖片幻燈片

表 1 仿真實(shí)驗(yàn)參數(shù)設(shè)置

項(xiàng)目指標(biāo)	參數(shù)值
信號幀長	2.56 ms
信號帶寬	25 kHz
濾波器階數(shù)	60
采樣頻率	125 kHz
阻帶頻率1/通帶頻率1	20/30 kHz
通帶頻率2/阻帶頻率2	50/60 kHz
阻帶衰減	50 dB

下載: 導(dǎo)出CSV

表 2 仿真系統(tǒng)參數(shù)設(shè)置

項(xiàng)目指標(biāo)	參數(shù)值
信號帶寬	25 kHz
信道帶寬	50 kHz
發(fā)射功率	18 dBm
干擾信號SNR	70～110 dB
鄰道干擾INR	40～80 dB

下載: 導(dǎo)出CSV

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