Title :
Blind spreading factor detectors for DS-CDMA receivers. Part II: detector performance comparisons
Author :
Juntti, Markku ; Rabbachin, Alberto ; Pajukoski, Kari
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
Abstract :
For pt.I, see ibid., p.390-4. The spreading factor (SF) in a code-division multiple-access system depends on the data rate of the user, and can therefore be unknown a priori for a communication receiver. The performance of optimal maximum a posteriori (MAP), decision directed (DD) and autocorrelation based blind SF detectors is studied via Monte Carlo computer simulations. The autocorrelation based SF detector appears to give performance close to the optimal MAP detector with perfect signal-to-noise ratio (SNR) knowledge. Furthermore, it is found to be significantly more robust to SNR estimation errors than the MAP detector.
Keywords :
3G mobile communication; cellular radio; code division multiple access; correlation methods; maximum likelihood estimation; radio receivers; spread spectrum communication; DS-CDMA receivers; MAP detector; SNR; autocorrelation based blind detector; blind spreading factor detection; code-division multiple-access system; communication receiver; decision directed detector; estimation errors; optimal maximum a posteriori detector; signal-to-noise ratio; third generation cellular communication systems; Autocorrelation; Computer simulation; Detectors; Estimation error; Monte Carlo methods; Multiaccess communication; Robustness; Signal to noise ratio;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2002 IEEE Seventh International Symposium on
Print_ISBN :
0-7803-7627-7
DOI :
10.1109/ISSSTA.2002.1048571
