Silicon Laboratories Inc.
Optimization For Angle Of Arrival And Angle Of Departure Detection

Abstract:

An optimized system and method for determining an angle of arrival or angle of departure is disclosed. A coarse pre-search is performed to identify the general location of the incoming signal. Based on this information, a high-resolution search is performed at the general location identified in the coarse pre-search. This multi-stage approach significantly reduces the number of computations that must be performed by the device, and also reduces the amount of memory that is required to store the results of the computations. For example, a full scan may require the computations to be performed over 32,000 times. Through use of this approach, the number of computations may be reduced by over 97%. This is a similar reduction in computation time and in the amount of memory consumed by this method.