数据采集与处理
數據採集與處理
수거채집여처리
JOURNAL OF DATA ACQUISITION & PROCESSING
2015年
3期
504-510
,共7页
戴宪华%李妍%余宝贤%苏冬日
戴憲華%李妍%餘寶賢%囌鼕日
대헌화%리연%여보현%소동일
准无损压缩%几何级数压扩%部分采样点校正%削峰尾插%FTT dp+GDSL系统
準無損壓縮%幾何級數壓擴%部分採樣點校正%削峰尾插%FTT dp+GDSL繫統
준무손압축%궤하급수압확%부분채양점교정%삭봉미삽%FTT dp+GDSL계통
nearly loss-less compression%geometric series companding (GSC)%partial sample calibration (PSC)%clipping with tail plug (CTP)%fiber to the distribution point + giga digital subscriber line (FTTdp+GDSL) system
传统的正交频分复用（Orthogonal frequency division multiplexing ，OFDM ）信号压缩算法由于低的压缩比和低的信号量化误差比（Signal to quantization‐error ratio ，SQR）造成较高的误码率，无法满足OFDM系统的需求。为了实现高的压缩比和低的误码率，提出了一种联合削峰尾插（Clipping with tail plug ，CTP）技术、几何级数压扩（Geometric series companding ，GSC）技术及部分采样点校正（Partial sample calibration ，PSC）技术的准无损压缩算法。计算机仿真结果表明，对于4096‐正交幅度调制（Quadrature amplitude modulation ，QAM ）的OFDM信号，压缩比最高可达1．86∶1，误码率低于10－7，量化误差对应的平均SQR高达70 dB ，因而能够很好地满足光纤到分配点＋千兆数字用户线路（Fiber to the distribution point＋GCga digital subscriber line ，FTTdp＋GDSL）系统的需求。
傳統的正交頻分複用（Orthogonal frequency division multiplexing ，OFDM ）信號壓縮算法由于低的壓縮比和低的信號量化誤差比（Signal to quantization‐error ratio ，SQR）造成較高的誤碼率，無法滿足OFDM繫統的需求。為瞭實現高的壓縮比和低的誤碼率，提齣瞭一種聯閤削峰尾插（Clipping with tail plug ，CTP）技術、幾何級數壓擴（Geometric series companding ，GSC）技術及部分採樣點校正（Partial sample calibration ，PSC）技術的準無損壓縮算法。計算機倣真結果錶明，對于4096‐正交幅度調製（Quadrature amplitude modulation ，QAM ）的OFDM信號，壓縮比最高可達1．86∶1，誤碼率低于10－7，量化誤差對應的平均SQR高達70 dB ，因而能夠很好地滿足光纖到分配點＋韆兆數字用戶線路（Fiber to the distribution point＋GCga digital subscriber line ，FTTdp＋GDSL）繫統的需求。
전통적정교빈분복용（Orthogonal frequency division multiplexing ，OFDM ）신호압축산법유우저적압축비화저적신호양화오차비（Signal to quantization‐error ratio ，SQR）조성교고적오마솔，무법만족OFDM계통적수구。위료실현고적압축비화저적오마솔，제출료일충연합삭봉미삽（Clipping with tail plug ，CTP）기술、궤하급수압확（Geometric series companding ，GSC）기술급부분채양점교정（Partial sample calibration ，PSC）기술적준무손압축산법。계산궤방진결과표명，대우4096‐정교폭도조제（Quadrature amplitude modulation ，QAM ）적OFDM신호，압축비최고가체1．86∶1，오마솔저우10－7，양화오차대응적평균SQR고체70 dB ，인이능구흔호지만족광섬도분배점＋천조수자용호선로（Fiber to the distribution point＋GCga digital subscriber line ，FTTdp＋GDSL）계통적수구。
Traditional compression algorithms of OFDM signals with low compression ratio and signal to quantization‐error ratio(SQR) come along with a high error rate ,which fail to meet the requirements of OFDM systems .To achieve the high compression ratio and the low error rate ,a new algorithm is pro‐posed based on a combination of clipping with tail plug (CTP) ,geometric series companding (GSC) and partial sample calibration (PSC) .The new algorithm can achieve the nearly loss‐less compression and the compression ratio can be as high as 1 .86∶1 with a error rate less than 10-7 ,while SQR corresponding to the quantization error is 70 dB in 4096‐QAM OFDM signal modulation schemes meeting the requirements of the FTTdp+GDSL systems well .
