線性調(diào)頻信號(hào)的級(jí)聯(lián)隨機(jī)共振數(shù)字化接收

侯成郭; 羅柏文; 李地

doi:10.11999/JEIT 141496

線性調(diào)頻信號(hào)的級(jí)聯(lián)隨機(jī)共振數(shù)字化接收

doi: 10.11999/JEIT 141496 cstr: 32379.14.JEIT 141496

1.
(解放軍信息工程大學(xué)信息系統(tǒng)工程學(xué)院鄭州 450002) ②(解放軍69260部隊(duì) 烏魯木齊 830000)

基金項(xiàng)目:

國家自然科學(xué)基金(60472064, 61201380)

計(jì)量
- 文章訪問數(shù): 927
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2014-11-26
- 修回日期: 2015-08-25
- 刊出日期: 2015-12-19

Cascaded Stochastic Resonance for Digitized Receiving of Linear Frequency Modulation Signal

1.
(Information System Engineering Institute, PLA Information Engineering University, Zhengzhou 450002, China)
2.
(Troops 69260 of PLA, Urumqi 830000, China)

Funds:

The National Natural Science Foundation of China (60472064, 61201380)

摘要

摘要: 為消除隨機(jī)共振系統(tǒng)的窄帶限制，實(shí)現(xiàn)線性調(diào)頻信號(hào)的高增益數(shù)字化接收，該文提出一種基于樣點(diǎn)頻率設(shè)定的數(shù)字化接收方法。該方法直接將線性調(diào)頻信號(hào)通過數(shù)字化的樣點(diǎn)篩選、頻率設(shè)定過程，變換為適配于后續(xù)級(jí)聯(lián)隨機(jī)共振系統(tǒng)的單頻信號(hào)。從而順利完成寬帶接收信號(hào)中噪聲能量向信號(hào)能量的轉(zhuǎn)化。理論和仿真實(shí)驗(yàn)表明該算法可實(shí)現(xiàn)線性調(diào)頻的解調(diào)，其處理增益較現(xiàn)有算法提高約2 dB。
- 無線通信 /
- 隨機(jī)共振 /
- 級(jí)聯(lián) /
- 線性調(diào)頻 /
- 數(shù)字化
Abstract: In order to eliminate the narrowband limit of stochastic resonance system, and to complete the digitized receiving of linear frequency modulation signal with high gain, a method based on the frequency setting of received digital samples is proposed. In this method, the linear frequency modulation is directly sent to the digitized samples flitting, frequency setting process, and is converted to a single frequency signal, which fits in the subsequent cascaded stochastic resonance system. As a result, the noise energy in broadband signal is converted to signal energy. Theory and simulation results show that the algorithm can demodulate the linear frequency modulation signal, and its processing gain is higher than the existing algorithms by about 2 dB.
- Wireless communication /
- Stochastic resonance /
- Cascaded /
- Linear Frequency Modulation (LFM) /
- Digitized

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參考文獻(xiàn)(20)

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