Frequency offset estimating method and receiver employing...

Details Frequency offset estimating method and receiver employing... Frequency offset estimating method and receiver employing...

2005-12-07

2009-11-10

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

Reexamination Certificate

active

07616710

ABSTRACT:
Provided is a method for estimating carrier wave or doppler frequency offset based on an approximated quadratic non-linear function in fine search, and a receiver employing the method. The method for estimating frequency offset includes the steps of: a) extracting more than three discrete samples in an order where the discrete samples are close to a maximum value of a power spectrum density function; b) inducing a quadratic non-linear function by using the extracted discrete samples; and c) estimating the frequency offset from a maximum point of the quadratic non-linear function. The technology of the present research makes it possible to exactly estimate frequency offset without increasing hardware complexity in estimation of carrier wave or doppler frequency offset.

REFERENCES:
Meyr, M. Moeneclaey, and S. A. Fechtel, “Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing,” John Wiley & Sons, Inc., N.Y. 1998, Chapter 9, pp. 505-532.

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