Title :
Performance Study on Spectrum Spreading and Scrambling Code in TD-SCDMA
Author :
Fu, Haiyang ; Zhao, Laiqiang ; Chen, Jijiang ; Jia, Xiangdong
Author_Institution :
Coll. of Commun. & Inf. Eng., Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
The working principle, implementation circuit and performance analysis of complex spectrum spreading and scrambling code in TD-SCDMA (TD) are discussed in this paper. Assuming 8 users and 3-path propagation channels or without multi-path fading environment, the performance comparison between TD and cdma2000 is studied in this paper. With three-level mode in base-band signal and small spreading factor for voice service, the performance of TD in both scenarios is worse. Moreover, in contrast to cdma2000 and WCDMA, TD doesn´t have the 1+1 backup function of orthogonal diversity transmission, which decreases its stability further. In TD, the value for half of the transmission chips is 0, so the transmission power and spectrum efficiency for user will be decreased.
Keywords :
3G mobile communication; code division multiple access; time division multiple access; 1+1 backup function; 3-path propagation channels; TD-SCDMA; base-band signal; cdma2000; multipath fading; orthogonal diversity transmission; spectrum scrambling code; spectrum spreading; spreading factor; time division synchronous code division multiple access; voice service; Bit error rate; Mobile communication; Phase shift keying; Receivers; Telecommunications; Time division synchronous code division multiple access;
Conference_Titel :
Internet Technology and Applications, 2010 International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-5142-5
Electronic_ISBN :
978-1-4244-5143-2
DOI :
10.1109/ITAPP.2010.5566442
