Collaborative channel sounding in multi-antenna systems

摘要

The disclosed embodiments relate to a system that performs channel-sounding operations in a multi-antenna wireless communication system. During operation, the system first performs channel-sounding operations between a first client and a second client in a first frequency band. These channel-sounding operations involve transmitting a series of known tones between the first client and the second client and using signals received as a result of the transmissions to finds a strongest path between the first client and the second client. Next, the system uses the identified strongest path to improve channel-sounding operations in a second frequency band.

主权项

1. A method for performing channel-sounding operations in a multi-antenna system, comprising:
performing first channel-sounding operations between a first client and a second client in a first frequency band, the first channel-sounding operations to generate a first channel characterizing signal representing a first characterization of a communication channel between the first client and the second client in response to a first test signal; determining, based on the first channel-sounding operations, a strongest path of the first test signal in the first frequency band communicated between the first client and the second client; configuring a receiver in the first client or the second client to suppress a component of a second test signal corresponding to the strongest path; performing second channel-sounding operations between the first client and the second client in a second frequency band, the second channel-sounding operations to generate a second channel characterizing signal representing a second characterization of the communication channel between the first client and the second client in response to the second test signal with the component of the second test signal corresponding to the strongest path suppressed; and outputting the second channel characterizing signal using the channel sounding operations in the first frequency band to improve channel sounding operations in a second frequency band.