【摘 要】
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A segmentation multi-dimensional crest factor reduction (SMD-CFR) algorithm is proposed for multi-service supporting digital radio over fibre (DRoF) system.Benefit from segmentation dynamic clipping threshold and clipping factor got basing on characterist
【机 构】
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School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China;C
论文部分内容阅读
A segmentation multi-dimensional crest factor reduction (SMD-CFR) algorithm is proposed for multi-service supporting digital radio over fibre (DRoF) system.Benefit from segmentation dynamic clipping threshold and clipping factor got basing on characteristics of all service bands,the SMD-CFR is able to get better peak clipping and peak to average power ratio (PAPR) reduction for multi-band combined signal.Simulation results show that SMD-CFR gets more than 2.3 reduction in PAPR for two-bands combined signal of long term evolution (LTE),which is much better than traditional one dimensional (1 D)-CFR.Meanwhile,for 64-quadrature amplitude modulation (QAM) modulation and demodulation link,it has very small effect on bit error rate (BER) and error vector magnitude (EVM),which are controlled less than 0.1％ and 0.2％ respectively.For hardware experiment,SMD-CFR obtains 4.5％ increase in drain efficiency and about 4 dBc increase in adjacent channel leakage ratio (ACLR).These are very significant for the wide band power amplifier (PA) in multi-service supporting DRoF system.
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