Title :
Downlink channel estimation and power control in CDMA systems
Author :
Kim, Hoon ; Koo, Jayong ; Kim, Keunyoung ; Han, Youngnam
Author_Institution :
Sch. of Eng., ICU, South Korea
Abstract :
In wireless communication systems, channel estimation is required not only for the coherent demodulation but also for the higher layer resource utilization. In WCDMA/FDD (wideband code division multiple access frequency division duplexing), downlink channel estimation can be performed in both CPICH (common pilot channel) and DPCCH (dedicated physical control channel). In this paper, considering the different link quality between CPICH and DPCCH according to the location of a mobile station (MS), estimation schemes that use both channels are suggested and their performances are compared in terms of mean square error (MSE). Power control effect on DPCCH channel estimation is also investigated in the performance evaluation.
Keywords :
broadband networks; channel estimation; code division multiple access; demodulation; frequency division multiplexing; mean square error methods; mobile radio; power control; radio links; telecommunication control; common pilot channel; dedicated physical control channel; downlink channel estimation; mean square error methods; mobile station; power control; wideband code division multiple access frequency division duplexing; wireless communication systems; Channel estimation; Communication system control; Demodulation; Downlink; Frequency conversion; Multiaccess communication; Power control; Resource management; Wideband; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1208786