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A Novel CFR Algorithm using Histogram-based Code Domain Compensation Process for WCDMA Basestation  

Chang, Hyung-Min (숭실대학교 정보통신전자공학부 통신 및 신호처리연구실)
Lee, Won-Cheol (숭실대학교 정보통신전자공학부 통신 및 신호처리연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.12C, 2007 , pp. 1175-1187 More about this Journal
Abstract
This paper proposes a novel crest factor reduction (CFR) algorithm to be deployed on WCDMA basestation. Generally speaking, it is well described that the reduction of peak-to-average ratio (PAR) yields the possibility of using low cost power amplifier such that the basesation becomes economic However, the simple reduction of PAR could degrade the signal quality measured by either peak code domain error (PCDE) or error vector measurement (EVM), and the level of channel interference constrained by adjacent channel leakage ratio (ACLR). Regarding these imperfections, this paper introduces an effective CFR algorithm in which the function of filter-dependent CFR (FDCFR) incorporated with the histogram-based waterfilling code domain compensation (HBWCDC) carries out. To verify the performance of the proposed CFR technique, substantial simulations including comparative works are conducted with obeying W-CDMA basestation verification specification. To exploit the superiority, the performance of the proposed method is tentatively compared with that associated to the simple memoryless clipping method and the memory-required filter-dependent clipping method.
Keywords
Crest Factor Reduction; Peak-to-Average Ratio; W-CDMA; Peak Code Domain Error; Error Vector Measurement;
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