Title :
Joint space-time channel parameter estimation for DS-CDMA system in multipath Rayleigh fading channels
Author :
Wang, K. ; Ge, H.
Author_Institution :
Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA
fDate :
3/29/2001 12:00:00 AM
Abstract :
An approximate maximum likelihood method for joint estimation of time delays and directions-of-arrival for direct-sequence code-division multiple-access systems over multipath Rayleigh fading channels is presented. To reduce the computational complexity, the multi-dimensional maximisation problem is transformed into two simple one-dimensional maximisation problems using an iterative scheme. To illustrate the performance, simulation results are compared with Cramer-Rao bounds
Keywords :
Rayleigh channels; code division multiple access; communication complexity; delay estimation; direction-of-arrival estimation; iterative methods; maximum likelihood estimation; multipath channels; spread spectrum communication; Cramer-Rao bounds; DS-CDMA system; approximate maximum likelihood method; code-division multiple-access system; computational complexity reduction; direct-sequence CDMA systems; directions-of-arrival estimation; iterative scheme; joint space-time channel parameter estimation; multi-dimensional maximisation problem; multipath Rayleigh fading channels; one-dimensional maximisation problems; time delay estimation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010310
