Invention Grant
- Patent Title: Multi-channel receiver with improved AGC
- Patent Title (中): 具有改进AGC的多通道接收器
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Application No.: US13085525Application Date: 2011-04-13
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Publication No.: US08391384B2Publication Date: 2013-03-05
- Inventor: Yhean-Sen Lai , Jie Song , Zhenyu Wang , Jinguo Yu
- Applicant: Yhean-Sen Lai , Jie Song , Zhenyu Wang , Jinguo Yu
- Applicant Address: US PA Allentown
- Assignee: Agere Systems LLC
- Current Assignee: Agere Systems LLC
- Current Assignee Address: US PA Allentown
- Agency: Mendelsohn, Drucker, & Associates, P.C.
- Agent Craig M. Brown; Steve Mendelsohn
- Main IPC: H04K27/00
- IPC: H04K27/00

Abstract:
An improved multi-channel receiver for satellite broadcast applications or the like. In an exemplary embodiment, a primary AGC loop controls an analog sub-receiver adapted to simultaneously receive multiple signals. Multiple digital demodulators, coupled to the sub-receiver, demodulate the multiple received signals. Multiple secondary AGC loops, one for each received signal, compensate for variations in demodulated signal strengths caused by the primary AGC loop. A feed-forward AGC compensation technique generates scalar control values for scaling the demodulated signals before the demodulated signals are processed by the secondary AGC loops. This at least partially compensates for gain variations caused by the primary AGC, reducing received signal drop-outs before the secondary AGC loops can compensate for the gain variations. Because of systemic delays in the sub-receiver and the demodulators, the scalar control values are independently timed to be coincident with the variations in the demodulated signal strengths caused by the primary AGC loop.
Public/Granted literature
- US20110188489A1 MULTI-CHANNEL RECEIVER WITH IMPROVED AGC Public/Granted day:2011-08-04
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