Title :
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
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;
Conference_Titel :
ASIC (ASICON), 2013 IEEE 10th International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4673-6415-7
DOI :
10.1109/ASICON.2013.6812010
