Beamforming techniques to improve ranging signal detection

Details Beamforming techniques to improve ranging signal detection Beamforming techniques to improve ranging signal detection

2011-08-23

2011-08-23

Ngo, Ricky (Department: 2464)

Multiplex communications

Communication over free space

Combining or distributing information via frequency channels

C342S368000, C375S267000

Reexamination Certificate

active

08005060

ABSTRACT:
Ranging code detection techniques are provided. Energy is received at a plurality of antennas of a first wireless communication device and received signals are generated from the received energy. The received energy comprises a ranging transmission from one or more second wireless communication devices, wherein each ranging transmission comprises a ranging code selected from a set of possible ranging codes. A ranging code specific receive beamforming weight vector is generated for a ranging code in the set of possible ranging codes from the received signals. The ranging code specific receive beamforming weight vector is applied to corresponding ranging code specific signals derived from the received signals to produce ranging code specific beamformed signals. The ranging code specific beamformed signals are correlated to produce correlation results. A determination is made as to whether the ranging code is present in the received energy based on the correlation results.

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