Title :
Uplink performance of TD-SCDMA systems
Author :
Liu, Shuqing ; Cruz, J.R.
Author_Institution :
Sch. of Electr. & Comput. Eng., Oklahoma Univ., Norman, OK, USA
Abstract :
The time-division duplex synchronous code-division multiple access (TD-SCDMA) system is unique among all the third generation (3G) standards under development, and has a number of advantages over other CDMA systems. However, a potential drawback is the need for uplink synchronization and the sensitivity of system performance to time misalignment. In this paper, we analyze the relationship between synchronization operation and the correlation properties of the spreading codes used in this standard and show that they drive the requirement for strict uplink synchronization. Compared to the sensitivity to time misalignment, the performance loss due to time delay estimation errors of the main path is relatively small. To validate the analytical results, a realistic simulation of the TD-SCDMA standard is carried out.
Keywords :
3G mobile communication; code division multiple access; correlation methods; delay estimation; spread spectrum communication; synchronisation; time division multiplexing; 3G standards; TD-SCDMA systems; correlation properties; spreading codes; third generation standards; time delay estimation errors; time misalignment; time-division duplex synchronous code-division multiple access; uplink performance; uplink synchronization; Analytical models; Code standards; Delay effects; Estimation error; Multiaccess communication; Performance loss; Standards development; Synchronous generators; System performance; Time division synchronous code division multiple access;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1404864
