通信学报
通信學報
통신학보
JOURNAL OF CHINA INSTITUTE OF COMMUNICATIONS
2013年
4期
138-143
,共6页
多频带正交频分复用%超宽带%时域扩展%同步%载波频偏
多頻帶正交頻分複用%超寬帶%時域擴展%同步%載波頻偏
다빈대정교빈분복용%초관대%시역확전%동보%재파빈편
MB-OFDM%UWB%time-domain spreading%synchronization%carrier frequency offset
对多频带正交频分复用超宽带系统同步技术进行研究,提出一种基于时域扩展技术(TDS)的盲载波频偏(CFO)跟踪算法.利用数据符号与其时域扩展符号的特殊映射关系,在时域和频域分别推导出残余载波频偏的盲估计公式,并构建相应的时频跟踪环路.仿真结果表明,该盲算法具有比导频辅助法更优的跟踪性能.10dB信噪比下,基于TDS进行时频跟踪的残余CFO均方根误差均达到2×10?4,系统误比特率可达10?6数量级.
對多頻帶正交頻分複用超寬帶繫統同步技術進行研究,提齣一種基于時域擴展技術(TDS)的盲載波頻偏(CFO)跟蹤算法.利用數據符號與其時域擴展符號的特殊映射關繫,在時域和頻域分彆推導齣殘餘載波頻偏的盲估計公式,併構建相應的時頻跟蹤環路.倣真結果錶明,該盲算法具有比導頻輔助法更優的跟蹤性能.10dB信譟比下,基于TDS進行時頻跟蹤的殘餘CFO均方根誤差均達到2×10?4,繫統誤比特率可達10?6數量級.
대다빈대정교빈분복용초관대계통동보기술진행연구,제출일충기우시역확전기술(TDS)적맹재파빈편(CFO)근종산법.이용수거부호여기시역확전부호적특수영사관계,재시역화빈역분별추도출잔여재파빈편적맹고계공식,병구건상응적시빈근종배로.방진결과표명,해맹산법구유비도빈보조법경우적근종성능.10dB신조비하,기우TDS진행시빈근종적잔여CFO균방근오차균체도2×10?4,계통오비특솔가체10?6수량급.
A blind carrier frequency offset (CFO) tracking algorithm based on time-domain spreading (TDS) was pro-posed for multiband orthogonal frequency division multiplexing ultra wide band systems. The scheme uses data symbols and the mapped TDS ones to develop time and frequency-domain estimators and tracking loops respectively. Simulation results indicate that the proposed scheme has a better performance in tracking accuracy than pilots-aided ones. Under the SNR of 10dB, the mean square root errors of the residual CFO reach 2×10?4, and the bit error rate of the system is 10?6 of magnitude.
