Title :
An analytic solution to the performance of iterated soft decision interference cancellation for coded CDMA transmission over frequency selective fading channels
Author :
Lampe, Alexander
Author_Institution :
Lehrstuhl fur Nachrichtentech., Erlangen-Nurnberg Univ., Germany
Abstract :
Coded transmission over time-variant multipath Rayleigh-fading channels employing direct sequence code division multiple access (DS-CDMA) is considered. Assuming ideal knowledge of the actual channel state and randomly chosen spreading sequences, the performance of iterative multiuser equalization based on adapted MMSE-filters combined with serial successive cancellation and single user decoding is solved analytically. For this, merely the statistics of the decoder must be known. Equipped with this solution, cumbersome simulations of the whole multiuser system can be avoided to evaluate the achievable bit error ratio in a wide range of interesting parameters
Keywords :
Rayleigh channels; adaptive filters; adaptive signal processing; code division multiple access; error statistics; fading channels; filtering theory; interference suppression; iterative decoding; least mean squares methods; multipath channels; multiuser channels; radio receivers; radiofrequency interference; spread spectrum communication; time-varying channels; DS-CDMA; achievable bit error ratio; adaptive MMSE-filters; channel state; coded CDMA transmission; decoder statistics; direct sequence code division multiple access; frequency selective fading channels; iterated soft decision interference cancellation; iterative multiuser decoding; iterative multiuser equalization; performance; randomly chosen spreading sequences; receiver algorithm; serial successive cancellation; single user decoding; time-variant multipath Rayleigh-fading channels; Additive white noise; Bit error rate; Decoding; Delay estimation; Fading; Filters; Frequency; Interference cancellation; Multiaccess communication; Performance analysis;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on
Conference_Location :
Parsippany, NJ
Print_ISBN :
0-7803-6560-7
DOI :
10.1109/ISSSTA.2000.876458