Title :
A CDMA scheme with optimum terminal filters based on channel prediction to mitigate multipath channel effects
Author :
Naidu, K. Rama ; Kumar, R. V Raja ; Lamba, T.S.
Author_Institution :
Dept. of Electron. & Electr. Commun. Eng., Indian Inst. of Technol., Kharagpur
Abstract :
We consider the use of transmit and receive filters as optimum terminal filters to mitigate the effects of fading channel in frequency division duplex-code division multiple access (FDD-CDMA) systems. It is shown that the effects of multipath fading channel at the mobile receiver can be mitigated by properly designing of the filters based on the use of channel information. In order to compensate the effect of feedback delay (which is inherently present in FDD systems), a linear prediction of channel coefficients is used in the system to design the terminal filters for the current slot transmission. From the simulation results, it is shown that our proposed method performs better than that of MMSE equalizer, RAKE receiver with transmit filter (FIR-RAKE).
Keywords :
channel estimation; code division multiple access; fading channels; filtering theory; mobile radio; multipath channels; radio receivers; CDMA; FDD; MMSE equalizer; RAKE receiver; channel prediction; code division multiple access; feedback delay; frequency division duplex; mobile receiver; multipath fading channel; optimum terminal filters; transmit-receive filters; Delay effects; Equalizers; Fading; Feedback; Frequency conversion; Information filtering; Information filters; Multiaccess communication; Multipath channels; Nonlinear filters; CIR; Channel Estimation; Correlation; FDD-CDMA; FIR-Rake; MMSE equalizer; Pre-Rake; Prediction;
Conference_Titel :
Wireless and Optical Communications Networks, 2008. WOCN '08. 5th IFIP International Conference on
Conference_Location :
Surabaya
Print_ISBN :
978-1-4244-1979-1
Electronic_ISBN :
978-1-4244-1980-7
DOI :
10.1109/WOCN.2008.4542541
