摘要
研究数字地面视频广播(DVB-T)OFDM(Orthogonal Frequency D ivision Multiplex)传输系统接收端的同步。根据DVB-T标准和OFDM原理,在FFT前该方案采用多载波系统时域的保护间隔所携带的冗余信息进行粗符号同步和分数粗频偏估计;在FFT后,利用频域插入的连续导频进行整数倍频偏估计、分数细频偏及采样钟偏移估计,利用散布导频实现精符号同步。
This paper researches synchronization in DVB - T OFDM transition system and presents a method for it. This method uses the guard interval inserted between symbols in time domain to perform the joint estimation of coarse symbol synchronization and the fraction value of carrier frequency offset. After FFT, using cp（ con- tinual pilots）in frequency domain, the integer value, the fine value and the sample clock frequency offset will be estimated. Using sp （scattered pilots） to get the exact symbol synchronization.
出处
《中国有线电视》
2005年第22期2190-2192,共3页
China Digital Cable TV
