Assembly structure of time-domain synchronous orthogonal frequency-division multiplex receiver
Title：
Assembly structure of time-domain synchronous orthogonal frequency-division multiplex receiver
Application Number：
 200410003484
Application Date：
 2004/03/31
Announcement Date：
 2005/10/05
Pub. Date：
Publication Number：
 1677877
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H04B 1/16, H04J 11/00
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Yang Zhixing, Yang Lin
Key Words：
 Assembly structure, time-domain synchronous, orthogonal frequency-division multiplex, receiver
Abstract：
 The invention comprises following structures: digital baseband signal is obtained from analog signal in high frequency after passing through tuner and two times of digital frequency conversion including steps of automatic gain control, frequency evaluation, and time evaluation etc. Then, PN codes are captured. Digital baseband signal is divided into two parts: data and signals of PN codes. After phase correction is carried out for data part, channel equalization is carried out based on channel evaluation obtained from PN codes. The result is sent to forward error correction for decoding. Finally, sending sequence is recovered. The invention makes TDS - OFDM receiver well adapt ideal or non-ideal baseband model. Through theoretical analysis, computer simulation, FPGA prototype, ASIC products in small order etc. main performance reaches or exceeds system requirement and better than other digital TV transmission system.
Claim：
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PCT：
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