대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2000년도 추계종합학술대회 논문집(1)
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- Pages.245-248
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- 2000
다중 경로 페이딩 채널에서 Bi-orthogonal Modulation을 이용한 Multi-code Parallel Combinatory CDMA System의 성능 개선
Performance Improvement of Multi-Code Parallel Combinatory CDMA Systems Using Bi-Orthogonal Modulation under Multipath Fading Environment
초록
In this paper, we present the performance of a multi-code parallel combinatory CDMA system using bi-orthogonal modulation under multipath fading channel. In general, the dynamic range of the amplitude of the transmit signal is very large in conventional multi-code CDMA systems, resulting in severe nonlinear distortion due to high power amplifier and thus significant BER performance degradation. Since the number of simultaneously multiplexed code channels in the proposed system is reduced, the proposed system exhibits reduction of peak-to-average power ratio (PAPR) of the transmit signal amplitude with significant BER improvement. We verify the performance of the proposed system by computer simulations under the Vehicular B multipath fading channel model by ARIB.
키워드