Multiple-branch wireless receiver

Details Multiple-branch wireless receiver Multiple-branch wireless receiver

2008-04-08

2008-04-08

Urban, Edward F. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S246100, C455S250100

Reexamination Certificate

active

10847431

ABSTRACT:
A wireless receiver detects signals received at two or more antennas, with each antenna coupled to an input receive chain. A switch is employed to couple selected input receive chains to one or more corresponding output receive chains during listening, coarse-detection, and fine-adjustment modes. At least one channel selection filter (CSF) is employed in each output receive chain, and the receiver employs sub-ranging. During idle mode, one antenna's input receive chain is connected to two or more CSFs to detect the packet. When the packet is detected, during a coarse-adjustment mode, the CSFs are reconfigured to couple each antenna's input receive chain to a corresponding output receive chain using low-gain signals. During fine-adjustment mode, the various gains are adjusted to be either high- or low-gain to maintain signals within the dynamic range of the corresponding CSFs.

REFERENCES:
patent: 6134430 (2000-10-01), Younis et al.
patent: 6871052 (2005-03-01), Spencer et al.
patent: 7031413 (2006-04-01), Doi
patent: 2005/0141407 (2005-06-01), Sandhu

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