Patent ID: 6115368
Filing Date: 2000-09-05
Classification: H04B,H04W

Abstract:
A method for communicating in a spread spectrum code division multiple access (CDMA) communication system having a transmitter and a receiver co-existing with a microwave system, the microwave system selectively utilizing various microwave frequencies within a selected range of frequencies, the method comprising:generating a spread spectrum CDMA data signal at the transmitter using a pseudo random chip code sequence, the spread data signal encompassing the selected range;the transmitter determining microwave frequencies currently used by the microwave system that have a spectrum overlapping a spectrum of the spread data signal and adaptively notch filtering the spread data signal at the determined microwave frequencies;transmitting from the transmitter to the receiver the notch filtered spread data signal; andthe receiver recovering data within the notch-filtered CDMA data signal using a replica of the chip code used for generating the spread data signal.