System and method for providing antenna diversity in multiple sub-carrier communication systems

摘要

A system and method to provide antenna diversity by switching between antenna feeds to optimize signal quality. Antenna conditions are determined during an OFDM guard interval to minimize disruption of symbol transmission. When the signal quality assessment determines that an improved signal is available on an alternative antenna, an antenna change is performed to switch to the alternative antenna, also during a GI, again minimizing disruption in information transmission. Preferably, the process is continually applied, so that antenna conditions are monitored for changing conditions and the antenna experiencing the best signal is selected.

主权项

1. A method for providing antenna diversity in a multiple sub-carrier digital communication receiver comprising:
providing a first antenna and a second antenna, wherein the first antenna is delivering a signal feed to the receiver and the second antenna is not delivering the signal feed to the receiver; estimating a Doppler frequency associated with the signal feed; and switching the signal feed being delivered to the receiver from the first antenna to the second antenna during a first guard interval directly in response to determining that the Doppler frequency is below a threshold such that the second antenna is delivering the signal feed to the receiver and the first antenna is not delivering the signal feed to the receiver.