Novel Narrowband Interference Rejection for an Asynchronous Spread Spectrum Wireless Modem Using a SAW Convolver (Special Issue on Spread Spectrum Techniques and Applications)
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概要
- 論文の詳細を見る
An asynchronous spread spectrum (SS) wireless modem has been implemented using an efficient ZnO-SiO_2-Si surface acoustic wave (SAW) convolver. The modem is based on a direct-sequence / frequency-shift-keying (DS / FSK) method for the modulation. The demodulation is carried out asynchronously utilizing the coherent correlation characteristics of the SAW convolver. In order to improve the narrowband interference rejection capability, we propose a new technique based on the reference signal control. A notched-reference-signal circuit and a self-convolution canceler are implemented in the SS modem for the reference signal control. It was found that the antijam capability for narrowband interference is at least -24 dB of desired-to-undesired power ratio (D / U); the improvement of the antijam capability is 16 dB up as compared with our previous SS modem.
- 社団法人電子情報通信学会の論文
- 1993-08-25
著者
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NAKASE Hiroyuki
Research Institute of Electrical Communication Tohoku University
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Nakase Hiroyuki
Research Institute Of Electrical Communicaiton Tohoku University
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TSUBOUCHI Kazuo
Research Institute of Electrical Communication, Tohoku University
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Tsubouchi Kazuo
Research Institute Of Electrical Communication Tohoku University
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Tsubouchi Kazuo
Research Institute Of Electrical Communicaiton Tohoku University
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Nakase Hiroyuki
Research Institute of Electrical Communication, Tohoku University
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TSUBOUCHI Kazuo
Research Institute of Electric Communication (RIEC), Tohoku University
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