Title :
Performance of channel estimation techniques for MC-CDMA systems
Author :
Hara, Yoshitaka ; Taira, Akinori ; Sekiguchi, Takashi
Author_Institution :
Information Technol. R & D Center, Mitsubishi Electr. Corp., Kanagawa, Japan
Abstract :
This paper presents the performance of two channel estimation (CE) techniques for MC-CDMA systems. One is time domain version, where multipath delay profile is estimated and transformed to propagation characteristics of each subcarrier. The other is frequency domain version, where the received signal at the output of fast Fourier transform (FFT) is correlated by the known pilot signal in each subcarrier. We analyze the performance of the two CE techniques and show the superiority of time domain version over frequency domain version. We also show that the performance of the time domain version is dependent on the type of pilot symbols used in MC-CDMA systems.
Keywords :
channel estimation; code division multiple access; fast Fourier transforms; frequency-domain analysis; mobile radio; signal processing; time-domain analysis; MC-CDMA systems; channel estimation techniques; fast Fourier transform; frequency domain version; multicarrier code division multiple access; multipath delay profile; pilot symbols; time domain version; Channel estimation; Delay effects; Delay estimation; Fast Fourier transforms; Frequency; Interference; Mobile communication; Multiaccess communication; Multicarrier code division multiple access; Propagation delay;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207199
