Title :
Diversity combining of a fast-varying, correlated multipath fading channel for direct-sequence spread-spectrum systems
Author :
Gao, Wen ; Tsai, Shiauhe ; Lehnert, James S.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
Diversity combining of fast-varying, correlated multiple-fading paths is investigated for direct-sequence spread-spectrum (DS-SS) systems. The multiple correlated paths are modeled as a vector autoregressive process, whose parameters are estimated using the expectation maximization (EM) technique. The proposed technique, requiring no derivatives of the log likelihood function, is computationally efficient and able to achieve near-optimum performance
Keywords :
Rayleigh channels; autoregressive processes; diversity reception; fading channels; multipath channels; optimisation; parameter estimation; spread spectrum communication; DS-SS systems; computationally efficient technique; correlated multipath fading channel; direct-sequence spread-spectrum systems; diversity combining; expectation maximization technique; multiple correlated paths; near-optimum performance; parameter estimation; vector autoregressive process; AWGN; Binary phase shift keying; Diversity reception; Fading; Matched filters; Multipath channels; Parameter estimation; Reactive power; Signal processing; Spread spectrum communication;
Conference_Titel :
Vehicular Technology Conference, 2000. IEEE-VTS Fall VTC 2000. 52nd
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-6507-0
DOI :
10.1109/VETECF.2000.886333
