Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2000.09a
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- Pages.951-954
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- 2000
Performance Improvement and Envelope Variation Reduction of Multi-Code Parallel Combinatory CDMA Systems Using Bi-Orthogonal Modulation
Bi-Orthogonal Modulation을 이용한 Multi-code Parallel Combinatory CDMA System의 성능 개선 및 진폭 변동 감소 방안
Abstract
In this paper, we present a multi-code parallel combinatory CDMA system using bi-orthogonal modulation to reduce envelope variation and improve bit error. .rate (BER) performance. In general, the dynamic range of the amplitude of the transmit signal is very large in the case of conventional multi-code CDMA systems, resulting in severe nonlinear distortion due to high power amplifier and thus significant BER performance degradation. The proposed system exhibits reduction of peak-to-average power ratio (PAPR) of the transmit signal amplitudes and significant performance improvement. We verify the performance of the proposed system by computer simulations under AWGN channel and flat fading channel.
Keywords