Patent ID: 8315345

Claim:
A method of detecting a receiver timing error with respect to a received signal, comprising the steps of: filtering the received signal with a narrow band filter so as to pass an upper band edge of the received signal and so as to discard a lower band edge of the received signal and so as to produce a first output signal; setting an average power level of the first output signal to a substantially constant value so as to produce a second output signal; and determining the timing error based on the second output signal, the step of determining of the timing error includes the sub-steps of: delaying the second output signal to produce a one sample delay signal; delaying the one sample delay signal to produce a two sample delay signal; determining a difference between the second output signal and the two sample delay signal; applying a constant gain to the one sample delay signal to produce a constant gain output signal; determining a hyperbolic tangent of the constant gain output signal to produce a hyperbolic tangent output signal; and multiplying the difference and the hyperbolic tangent output signal to produce the timing error.