Patent ID: 7039370
Filing Date: 2006-05-02
Classification: H01Q,H04B,H04L,H04W

Abstract:
1. A method of operating a wireless terminal to communicate with a base station, said wireless terminal including a plurality of antenna elements, the method comprising: transmitting symbols during a period of time, said period of time including a plurality of dwell intervals, each dwell interval including a plurality of OFDM symbol transmission time periods, said transmitting during a dwell interval including using a set of tones for the duration of the dwell interval, a different set of tones being used for consecutive dwell intervals occurring in said period of time, wherein different sets of tones used during consecutive dwell intervals differ by at least one tone; and switching the signal being transmitted during said period of time between said first and second antenna elements, one of said first and second antenna elements going unused during any point in said period of time, said switching being performed on at least some dwell boundaries, no switching between antenna elements occurring during a dwell time interval, said dwell boundaries occurring between consecutive dwell transmission time intervals, a symbol transmission time period preceding a dwell boundary being immediately followed by a subsequent symbol transmission time period in the following dwell interval without the consecutive symbol transmission time period being separated from the preceding transmission time period by a non-transmission gap.