Patent ID: 8694037
Filing Date: 2014-04-08
Classification: H04L

Abstract:
1. A method for optimizing the delay spread capability of a radio receiver device, comprising: receiving at said radio receiver device a desired RF signal on a main channel; demodulating in said radio receiver device said desired RF signal to extract therefrom a baseband digital data signal; evaluating in said radio receiver device a delay spread environment to determine if said desired RF signal is being received under conditions of low delay spread or high delay spread; determining in said radio receiver device a first received power level of said desired RF signal on said main channel; determining in said radio receiver device a second received power level of at least one interfering RF signal received on an adjacent channel which is adjacent to said main channel but offset in frequency as compared to said main channel by a predetermined channel spacing; in said low delay spread condition, filtering in said radio receiver device said baseband digital data signal using a narrow filter having a center frequency; in a high delay spread condition, filtering in said radio receiver device said baseband signal using a wide filter having said center frequency and a bandwidth wider than said narrow filter, and selectively shifting said center frequency in accordance with a predetermined frequency offset if said second received power level of said at least one interfering RF signal exceeds said first received power level by a predetermined threshold amount.