Title :
Performance of multiuser detection with adaptive channel estimation
Author :
Stojanovic, Milica ; Zvonar, Zoran
Author_Institution :
Dept. of Electr. & Comput. Eng., Northeastern Univ., Boston, MA, USA
fDate :
8/1/1999 12:00:00 AM
Abstract :
An adaptive multipath decorrelating multiuser receiver is considered for application in Rayleigh fading multipath channels with significant Doppler spread. Coherent diversity combining is performed using adaptively obtained channel estimates in a manner that minimizes the impact of estimation errors on data detection. The bit-error rate of the receiver is evaluated analytically, showing dependence on the fading rate of the channel and tracking capabilities of adaptive least mean square and recursive least square algorithms, in addition to the order of multipath diversity and the number of active code-division multiple-access users
Keywords :
Rayleigh channels; adaptive estimation; adaptive signal detection; code division multiple access; decorrelation; diversity reception; error statistics; interference suppression; least squares approximations; multipath channels; multiuser channels; radio receivers; radiofrequency interference; recursive estimation; CDMA; Doppler spread; Rayleigh fading multipath channels; adaptive channel estimates; adaptive channel estimation; adaptive least mean square algorithm; adaptive multipath decorrelating multiuser receiver; adaptive recursive least square algorithm; bit-error rate; code-division multiple-access; coherent diversity combining; data detection; estimation errors; fading rate; multipath diversity order; multiple access interference elimination; multiuser detection; tracking; Algorithm design and analysis; Bit error rate; Channel estimation; Decorrelation; Diversity reception; Estimation error; Least squares methods; Multipath channels; Multiuser detection; Rayleigh channels;
Journal_Title :
Communications, IEEE Transactions on
