发明名称 |
SYNCHRONIZATION METHOD AND SYSTEM FOR A DIGITAL RECEIVER |
摘要 |
A synchronization system and method for obtaining frame, carrier, and sampling synchronization of an input OFDM modulated digital signal having a pseudoperiodic second symbol. The system includes an apparatus for obtaining frame synchronization, and the apparatus includes an envelope detector to detect the first symbol of the input signal, and a differentiato r connected to the envelope detector to detect the second symbol. The differentiator includes a first filter having a transfer function H(z) = (1 + Z-1) and a second filter having a transfer function Hp(z) = (1 - Z-n/2 + Z-n - Z- 3n/2), where n equals to a number of samples in the input signal. Synchronization of the carrier frequency offset is obtained by first obtaining the fractiona l carrier frequency offset, and then obtaining the integral carrier frequency offset through a matched filtering process. Sampling frequency synchronization is obtained through the matched filtering process for determining integral carrier frequency offset.
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申请公布号 |
CA2208626(C) |
申请公布日期 |
2002.03.05 |
申请号 |
CA19972208626 |
申请日期 |
1997.06.23 |
申请人 |
INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE |
发明人 |
HUANG, YUNG-LIANG;LU, CHUN-CHIAN;HUANG, CHIA-CHI |
分类号 |
H04L27/26;(IPC1-7):H04L7/027;H04J11/00 |
主分类号 |
H04L27/26 |
代理机构 |
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