电路与系统学报
電路與繫統學報
전로여계통학보
JOURNAL OF CIRCUITS AND SYSTEMS
2009年
5期
92-97
,共6页
OFDMA%频偏盲估计%子载波分配
OFDMA%頻偏盲估計%子載波分配
OFDMA%빈편맹고계%자재파분배
OFDMA%blind estimation of frequency offset%subcarrier allocation
正交频分多址(OFDMA)系统同步问题的难点在于上行链路的频率同步,本文针对OFDMA系统上行链路,利用基于数据重构的music算法来提取接收信号的共轭自相关信息中所包含的用户频偏信息,不需要任何导频信号或训练序列的帮助.通过算法仿真,表明该算法可以有效的抵抗噪声和信号间干扰.
正交頻分多阯(OFDMA)繫統同步問題的難點在于上行鏈路的頻率同步,本文針對OFDMA繫統上行鏈路,利用基于數據重構的music算法來提取接收信號的共軛自相關信息中所包含的用戶頻偏信息,不需要任何導頻信號或訓練序列的幫助.通過算法倣真,錶明該算法可以有效的牴抗譟聲和信號間榦擾.
정교빈분다지(OFDMA)계통동보문제적난점재우상행련로적빈솔동보,본문침대OFDMA계통상행련로,이용기우수거중구적music산법래제취접수신호적공액자상관신식중소포함적용호빈편신식,불수요임하도빈신호혹훈련서렬적방조.통과산법방진,표명해산법가이유효적저항조성화신호간간우.
The real challenge of synchronization in OFDMA exists in the OFMDA uplink. For the OFDMA uplink, this paper, a blind estimation algorithm of frequency offset based on the improved music algorithm is presented, which use the conjugate autocorrelation of the received signal, and this blind algorithm can estimate the frequency offset of each user without the help of any pilot or training sequence. The performance of high resolution and immune to the effect of noise and interference is evaluated through the simulation results.