Title :
Performance degradation due to code tracking errors in spread-spectrum code-division multiple-access systems
Author :
Hart, Bas W´ T ; Van Nee, Richard D J ; Prasad, Ramjee
Author_Institution :
Telecommun. & Traffic-Control Syst. Group, Delft Univ. of Technol., Netherlands
fDate :
10/1/1996 12:00:00 AM
Abstract :
The influence of code synchronization errors on the performance of direct-sequence spread-spectrum (DS/SS) communication systems is investigated. Insight is gained in the degradation of some basic performance parameters due to the tracking bias of a noncoherent delay lock loop (DLL). The performance parameters investigated are the bit-error probability, throughput and delay. Numerical results show that for receivers with an early-late spacing of d=1, using a noncoherent DLL, the results of a system performance analysis in a fast fading environment can be much too optimistic if the tracking errors are ignored
Keywords :
channel capacity; code division multiple access; coding errors; delay circuits; delays; error statistics; fading; land mobile radio; pseudonoise codes; radio receivers; spread spectrum communication; DS/SS communication systems; bit-error probability; code synchronization errors; code tracking errors; delay; direct-sequence spread-spectrum; fast fading environment; noncoherent delay lock loop; performance degradation; receivers; spread-spectrum code-division multiple-access systems; throughput; tracking bias; Additive white noise; Bandwidth; Degradation; Delay; Fading; Interference; Multiaccess communication; Spread spectrum communication; System performance; Tracking loops;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
