Suppression Circuit Design of interference Using Orthogonal Signal 


Vol. 27,  No. 10, pp. 969-979, Oct.  2002


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  Abstract

This paper proposes a novel method of minimizing Interference which causes data decision error in digital wireless communications. In this method, in order to suppress ISI which is caused by the phase difference between the transmitted and received signal phases, the transmitted and received signals are always keptorthogonal by compensating the transmitted signal phase according to the detected received signal phase. A voltage control oscillator (VCO) which generates a reference signal for detecting the phase noise and the delay of the received signal was implemented by MOS circuits. To delay the phase of the signal, additive white Gaussian noise (AWGN) environment was used. The phase and delay of the signal transmitted through AWGN channel were compensated in the modulator of the transmitter and the compensated signal was demodulated using quasi-direct conversion receiver and QPSK demodulator. ISI suppression was achieved by keeping the orthogonality between the compensated transmitted signal and the received signal. The error probability of data decision was compared. By simulation the proposed system was proved to be effective in minimizing the ISI.

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  Cite this article

[IEEE Style]

J. Yoon and J. Chong, "Suppression Circuit Design of interference Using Orthogonal Signal," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 10, pp. 969-979, 2002. DOI: .

[ACM Style]

Jeoung-Sig Yoon and Jong-Wha Chong. 2002. Suppression Circuit Design of interference Using Orthogonal Signal. The Journal of Korean Institute of Communications and Information Sciences, 27, 10, (2002), 969-979. DOI: .

[KICS Style]

Jeoung-Sig Yoon and Jong-Wha Chong, "Suppression Circuit Design of interference Using Orthogonal Signal," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 10, pp. 969-979, 10. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880