Title :
Performance of combined DDLL and AGC loop for direct-sequence spread-spectrum systems
Author :
Su, Szu-Lin ; Yen, Nan-Yang
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
fDate :
9/1/2000 12:00:00 AM
Abstract :
The automatic gain control (AGC) loops are usually used in communication systems to stabilize the performance. In this paper, the combined performance of digital delay-locked loop (DDLL) and AGC loop for direct-sequence spread-spectrum systems is analyzed. Especially, the inherent coupling effects between DDLL and AGC loop are developed. The numerical results show that the DDLL with AGC loop can offer a reliable and satisfactory performance
Keywords :
automatic gain control; delay lock loops; digital communication; pseudonoise codes; spread spectrum communication; statistical analysis; tracking; AGC loop; DDLL; PN code tracking; automatic gain control loops; communication systems; digital delay-locked loop; direct-sequence spread-spectrum systems; inherent coupling effects; numerical results; performance; Additive white noise; Bandwidth; Delay estimation; Frequency estimation; Gain control; Propagation delay; Sampling methods; Spread spectrum communication; Timing; Tracking loops;
Journal_Title :
Communications, IEEE Transactions on
