Automatic gain control algorithm with high-speed and double closed-loop in UWB system

Author

Bing Jing ; Yuankun Xue ; Ye Fan ; Ning Li ; Junyan Ren

Author_Institution

State-Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China

fYear

2013

fDate

28-31 Oct. 2013

Firstpage

1

Lastpage

4

Abstract

Due to large dynamic range requirement of signal in UWB receiver, this paper presents a novel double closed-loop automatic gain control (AGC) algorithm. Compared with the conventional AGC algorithm, the proposed algorithm has a large adjustable range and fast convergence. The first AGC loop before synchronization module is used for coarse tuning; the second AGC loop after synchronization module calculating the symbol power in preamble to approximate the reference power, it is used for fine tuning. The simulations based on the DC-OFDM UWB receiver and Gaussian channel showed that the proposed AGC algorithm could effectively improve the adjustable range of VGA gain, further more it could improve convergence speed.

Keywords

Gaussian channels; OFDM modulation; automatic gain control; closed loop systems; synchronisation; telecommunication control; ultra wideband communication; AGC algorithm; DC-OFDM UWB receiver; Gaussian channel; UWB system; VGA gain; double closed-loop automatic gain control algorithm; high-speed automatic gain control algorithm; reference power; symbol power; synchronization module; Convergence; Gain; Gain control; Heuristic algorithms; Receivers; Signal to noise ratio; Synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC (ASICON), 2013 IEEE 10th International Conference on

Conference_Location

Shenzhen

ISSN

2162-7541

Print_ISBN

978-1-4673-6415-7

Type

conf

DOI

10.1109/ASICON.2013.6812010

Filename

6812010