Fast automatic gain control employing two compensation loop for high throughput MIMO-OFDM receivers

The performance of a receiver front-end limits the quality and range of the given communication link. An appropriate design based on well-defined system parameters and architecture can make a huge difference in the performance, cost and marketability of the entire system. In particular, there is a n...

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Bibliographic Details
Published in2006 IEEE International Symposium on Circuits and Systems (ISCAS) p. 4 pp.
Main Authors Il-Gu Lee, Jungbo Son, Eunyoung Choi, Sok-Kyu Lee
Format Conference Proceeding
LanguageEnglish
Published IEEE 2006
Subjects
Circuits
Communication system control
Electronic mail
Frequency synchronization
Gain control
OFDM
Signal design
Signal processing
Throughput
Wireless LAN
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Summary:The performance of a receiver front-end limits the quality and range of the given communication link. An appropriate design based on well-defined system parameters and architecture can make a huge difference in the performance, cost and marketability of the entire system. In particular, there is a need for improved digital automatic gain control (AGC) for use in multi input multi output orthogonal frequency division multiplexing (MIMO-OFDM) systems with application to wireless local area networks (WLANs), targeted for the upcoming 802.11n standard based in H. Yu et al. (2004) and H. Yu et al. (2005). In this paper, we propose an efficient algorithm and implementation of the digital AGC for next generation WLANs. The proposed AGC algorithm has two feedback loops for gain control to improve convergence speed, and at the same time maintains the stability of the AGC circuit. Also, a complete set of parameters for practical implementation is obtained by various experiments with fixed point constraints and accuracy requirements
ISBN:0780393899
9780780393899
ISSN:0271-4302
2158-1525
DOI:10.1109/ISCAS.2006.1693869