Patent ID: 6483884
Filing Date: 2002-11-19
Classification: H04B

Abstract:
A method for selecting an operating antenna from a plurality (n) of antennas, comprising the steps of:1. selecting an operating antenna as a function of received signal strength by performing the steps of: (a) detecting the received signal strength at each of said antennas and storing a Received Signal Strength Indicator (RSSIi) for each of said antennas, wherein RSSI0 corresponds to a currently selected antenna; (b) calculating a delta RSSI (&Dgr;RSSIi) equal to RSSIi minus RSSI0 for each non-selected antenna; (c) if a maximum &Dgr;RSSIi value equals or exceeds a first predetermined quality threshold value, T1, selecting the non-selected antenna corresponding to said maximum &Dgr;RSSIi to be said currently selected antenna, resetting a cycle counter, and returning to Step 1(a); (d) if said maximum &Dgr;RSSIi value does not equal or exceed said first predetermined quality threshold value, T1, incrementing said cycle counter, and, if said cycle counter is less than a predetermined cycle count, returning to Step 1(a), otherwise, if said cycle counter equals or exceeds said predetermined cycle count, proceeding to Step 2; 2. selecting said operating antenna as a function of a Cyclical Redundancy Check (CRC) by performing the steps of: (a) decoding the CRC error rate of the signal received by said currently selected antenna; (b) if the decoded CRC error rate exceeds a second predetermined quality threshold value, T2, selecting the non-selected antenna corresponding to said maximum &Dgr;RSSIi to be said currently selected antenna, resetting said cycle counter and returning to Step 1(a); (c) if the decoded CRC error rate does not exceed said second predetermined quality threshold value, T2, resetting said cycle counter and returning to Step 1(a).