DocumentCode :
408156
Title :
MMSE equalization for UMTS HSDPA
Author :
Love, Robert ; Stewart, Kenneth ; Bachu, Raja ; Ghosh, Amitava
Author_Institution :
Motorola Personal Commun. Sector, Libertyville, IL, USA
Volume :
4
fYear :
2003
fDate :
6-9 Oct. 2003
Firstpage :
2416
Abstract :
The impact of ´advanced´ mobile receivers incorporating dual-port antenna diversity and chip-rate equalization is assessed in terms of UMTS Release-5 high speed downlink packet access (HSDPA) link and system throughput. The addition of a second antenna port to the RAKE receiver increased the link-level throughput under 3GPP RAN WG4 test conditions by 25-100%, while a chip-rate minimum mean square error (MMSE) equalizer increased throughput by approximately the same amount for the time-dispersive (Pedestrian-B) channel. Assuming ideal channel estimation, the improvement in sector throughput was between 25-90% depending on the receiver configuration. Neglecting TCP, user throughput increased 50 to 100% when either receives diversity or MMSE equalization was applied, with the throughput increase becoming 100 to 200% for the dual-port MMSE case. When TCP was included, however, user throughput improvement reduced to 20% (MMSE equalizer), 33% (dual-port RAKE) and 45% (dual-port MMSE) respectively for the same system load.
Keywords :
3G mobile communication; cellular radio; channel estimation; dispersive channels; diversity reception; least mean squares methods; multifrequency antennas; radio access networks; radio links; radio receivers; 3GPP RAN WG4 test; HSDPA; MMSE; RAKE receiver; UMTS Release-5; channel estimation; chip-rate equalization; dual-port antenna diversity; high speed downlink packet access link; minimum mean square error equalizer; mobile receivers; radio access network working group4; time-dispersive channel; 3G mobile communication; Diversity methods; Downlink; Equalizers; Fading; Mobile antennas; Multiaccess communication; RAKE receivers; Receiving antennas; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th
ISSN :
1090-3038
Print_ISBN :
0-7803-7954-3
Type :
conf
DOI :
10.1109/VETECF.2003.1285963
Filename :
1285963
Link To Document :
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