Title :
Chip-level MMSE equalization at the edge of the cell
Author :
Krauss, T.P. ; Zoltowski, Michael D.
Author_Institution :
Sch. of Electr. Eng., Purdue Univ., West Lafayette, IN, USA
Abstract :
We examine the performance of two linear equalizers for a CDMA downlink over a frequency-selective multipath channel: the traditional RAKE receiver, and a chip-level MMSE (minimum mean square error) equalizer. The mobile-station assumed to be midway between two base-stations. We examine the system performance for one versus two receive antennas, and normal operation versus soft-hand-off mode. MMSE is confirmed to outperform RAKE. Also, having two receive antennas is superior to having a single antenna. Simulation results are presented for uncoded BPSK and 16-QAM, and BPSK with convolutional coding
Keywords :
cellular radio; convolutional codes; equalisers; least mean squares methods; modulation coding; multipath channels; multiuser channels; phase shift keying; quadrature amplitude modulation; radio receivers; receiving antennas; BER; BPSK; CDMA downlink; RAKE receiver; base-stations; cell edge; cellular radio; chip-level MMSE equalization; convolutional coding; frequency-selective multipath channel; linear equalizers; minimum mean square error; mobile-station; modulation coding; normal operation; receive antennas; simulation results; soft-hand-off mode; system performance; uncoded 16-QAM; uncoded BPSK; Binary phase shift keying; Downlink; Equalizers; Fading; Frequency; Mean square error methods; Multiaccess communication; Multipath channels; Receiving antennas; System performance;
Conference_Titel :
Wireless Communications and Networking Confernce, 2000. WCNC. 2000 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-6596-8
DOI :
10.1109/WCNC.2000.904663
