System and method for compensating timing error using pilot...

Details System and method for compensating timing error using pilot... System and method for compensating timing error using pilot...

2006-09-19

2006-09-19

Nguyen, Brian (Department: 2661)

Multiplex communications

Communication over free space

Combining or distributing information via frequency channels

C370S210000, C370S319000, C370S480000, C375S149000, C375S362000

Reexamination Certificate

active

07110387

ABSTRACT:
A timing error compensation system in an OFMD/CDMA communication system includes an analog-to-digital converter for converting an OFDM signal, comprised of a data symbol stream in which a pilot symbol is inserted at intervals of a prescribed number of data symbols, received from a transmitter, to a digital OFDM symbol stream by prescribed sampling synchronization, a guard interval remover for removing a guard interval inserted in the OFDM symbol by prescribed frame synchronization, and a fast Fourier transform (FFT) device for performing fast Fourier transform on the guard interval-removed OFDM symbol and outputting a data symbol stream. In the time error compensation system, a pilot symbol detector receives the data symbol stream and detects the pilot symbols inserted in the data symbol stream at prescribed intervals. A timing compensator determines a linear phase difference line for the detected pilot symbol, generates a timing error estimation signal according to the determined linear phase difference line, and provides the timing error estimation signal to the analog-to-digital converter and the guard interval remover so as to determine the sampling synchronization and the frame synchronization.

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