Title :
Jitter performance of a baseband sampled code tracking loop
Author :
Kallman, Kurt ; Davis, George
Author_Institution :
Commun. Div., Motorola Inc., Scottsdale, AZ, USA
fDate :
11/1/1994 12:00:00 AM
Abstract :
The purpose of this paper is to investigate the steady-state tracking performance of a digital baseband noncoherent code tracking loop in the presence of additive white Gaussian noise (AWGN). The delay-locked loop (DLL) structure is evaluated. Particular areas of concern are the effect of carrier frequency uncertainty, branch filter bandwidth and loop filter bandwidth. For a fixed data rate, code chip rate and signal-to-noise ratio there is an optimum length for the digital branch filters which minimizes the tracking jitter
Keywords :
codes; delays; discriminators; random noise; spread spectrum communication; white noise; AWGN; DLL; additive white Gaussian noise; baseband sampled code tracking loop; branch filter bandwidth; carrier frequency uncertainty; code chip rate; delay-locked loop; digital baseband tracking loop; direct sequence spread spectrum; discriminator; fixed data rate; jitter performance; loop filter bandwidth; noncoherent code tracking loop; pseudonoise sequence; signal-to-noise ratio; steady-state tracking performance; timing jitter; AWGN; Additive white noise; Bandwidth; Baseband; Delay; Filters; Frequency; Jitter; Steady-state; Tracking loops;
Journal_Title :
Communications, IEEE Transactions on
