Title :
An efficient RAKE receiver architecture with pilot signal cancellation for downlink communications in DS-CDMA indoor wireless networks
Author :
Fantacci, Romano ; Galligani, Andrea
Author_Institution :
Dept. of Electron. Eng., Florence Univ., Italy
fDate :
6/1/1999 12:00:00 AM
Abstract :
This paper deals with a RAKE receiver architecture which makes use of a pilot signal broadcast by the base station to obtain channel parameter estimates in a direct-sequence code division multiple access (DS-CDMA) indoor wireless network. A suitable cancellation algorithm, which is different from previous approaches, is used to reduce multipath interference due to the pilot signal. Numerical results are used to demonstrate the performance of the proposed RAKE receiver in terms of the bit error probability under typical multipath fading propagation conditions. Performance comparisons with the ideal case of perfect channel parameter estimation are given in order to highlight the good behavior of the proposed approach
Keywords :
cellular radio; code division multiple access; error statistics; fading channels; indoor radio; interference suppression; multipath channels; multiuser channels; parameter estimation; quadrature phase shift keying; radio links; radio networks; radio receivers; radiofrequency interference; signal detection; spread spectrum communication; DS-CDMA indoor wireless networks; QPSK; RAKE receiver architecture; base station; bit error probability; cancellation algorithm; channel parameter estimates; digital detection scheme; direct-sequence code division multiple access; downlink communications; multipath fading propagation; multipath interference reduction; perfect channel parameter estimation; performance; pilot signal cancellation; Base stations; Broadcasting; Downlink; Error probability; Fading; Interference cancellation; Multiaccess communication; Multipath channels; Parameter estimation; Wireless networks;
Journal_Title :
Communications, IEEE Transactions on
