Tracking automatic gain control of orthogonal frequency...

Details Tracking automatic gain control of orthogonal frequency... Tracking automatic gain control of orthogonal frequency...

2011-06-28

2011-06-28

Tran, Khai (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

Reexamination Certificate

active

07970066

ABSTRACT:
A system includes an input, a variable gain amplifier (VGA), and an automatic gain control (AGC) module. The input receives an input signal. The input signal includes frames of N symbols modulated using orthogonal frequency division multiplexing (OFDM), wherein a cyclic prefix (CP) precedes each of the N symbols, and wherein N is an integer greater than 1. The VGA provides a gain when amplifying the input signal. The AGC module selectively adjusts the gain of the VGA during the CP preceding M of the N symbols, wherein M is an integer greater than 1.

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IEEE Std 802.16e™-2005 and IEEE Std 802.16™-2004/Cor1-2005 (Amendment and Corrigendum to IEEE Std 802.16-2004); IEEE Standard for Local and metropolitan area networks; Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems; Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1; IEEE Computer Society and IEEE Microwave Theory and Techniques Society; Sponsored by the LAN/MAN Standards Committee; Feb. 28, 2006; 861 pages.

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