Method for estimating and compensating carrier frequency offset

Details Method for estimating and compensating carrier frequency offset Method for estimating and compensating carrier frequency offset

2006-12-01

2010-11-30

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S259000, C375S346000, C455S059000

Reexamination Certificate

active

07844004

ABSTRACT:
One inventive aspect relates to a method of estimating carrier frequency offset introduced on an RF multicarrier signal received via a transmission channel on a direct downconversion analog receiver. The method comprises generating a preamble comprising at least one set of training symbols. The method further comprises transmitting the preamble to the receiver. The method further comprises determining a carrier frequency offset estimate from the received preamble by an estimation method which has a higher precision for a first range of carrier frequency offset values and a lower precision for a second range of carrier frequency offset values. The method further comprises introducing a predetermined artificial carrier frequency offset on at least one set of training symbols, the predetermined artificial carrier frequency offset being chosen for shifting the carrier frequency offset of that set of training symbols to the first range.

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