关键词: 多载波系统, 窄带干扰, 定时同步, 序列检测

Abstract:

The statistical property of timing metric is analyzed in the presence of narrowband interference. The missing and false detection probabilities of training sequence are addressed according to the probability distributions of timing metric. It is shown that the performance of timing metric estimation can not be influenced by signal to interference ratio (SIR). In normal condition, the noise is the key factor which affects estimation performance when SIR is high(higher than 10?dB). The mean and the variance of timing metric is hardly affected by jamming bandwidth in a given SIR. The missing detection probability of training sequence, affected by narrowband interference (NBI), becomes high when SIR is lower than 15?dB. The false detection probability is not related to signaltonoise ratio (SNR) and SIR.

Key words: multi-carrier systems, narrowband interference, timing synchronization, sequence detection