Method and apparatus for estimating the frequency and/or...

Details Method and apparatus for estimating the frequency and/or... Method and apparatus for estimating the frequency and/or...

2005-09-20

2005-09-20

Ghayour, Mohammed (Department: 2631)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S350000, C375S375000, C375S240120, C375S329000, C375S334000, C375S323000, C375S362000, C455S154100

Reexamination Certificate

active

06947508

ABSTRACT:
An apparatus and method for estimating a frequency and/or a phase of a digital input signal by determining phase values of the input signal. The phase values are then added over a predetermined summation length N/B. The sampling rate of the added-up phase values are reduced by a factor N/B in comparison with the sampling rate of the phase values. The added-up phase values are delayed in a chain of at least B−1 delay elements. The differently-delayed added-up phase values are then added or subtracted to create a resulting. pulse response of the frequency such that the resulting pulse response of the frequency is constant positive in a first interval, is zero in a second interval and is constant negative in a third interval, so that a resulting pulse response of the phase is constant in at least a middle interval or is otherwise zero.

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