Patent ID: 7254200

Claim:
A method for detecting a complex frequency burst in a received complex signal at a wireless receiver, the complex frequency burst having a known length, the method comprising the steps of: a. filtering past samples of the received complex signal using a complex signal based adaptive filter to obtain a filtered current sample of the received complex signal; b. obtaining a complex error between the filtered current sample of the received complex signal and an actual current sample of the received complex signal; c. adapting the adaptive filter using the complex error; and d. locating the complex frequency burst using the complex error, wherein the step of locating the complex frequency burst using the complex error comprises the steps of: if a previous sample of the received complex signal is established to belong to the complex frequency burst, then performing the step of: analyzing the complex error to establish whether the previous sample of the received complex signal is a last sample of the complex frequency burst; and if the previous sample of the received complex signal is not established as the last sample of the complex frequency burst, then performing the step of: establishing that the current sample of the received complex signal belongs to the complex frequency burst; and if the previous sample of the received complex signal is not established to belong to the complex frequency burst, then performing the step of: analyzing the complex error to establish whether the current sample of the received complex signal belongs to the complex frequency burst.