Finger allocation for advanced WCDMA uplink

Paavo Hahtola, Ilkka Moilanen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

In this paper, we study alternative finger allocation algorithms for high speed uplink packet access (HSUPA) mode of wideband code division multiple access (WCDMA) receiver. Higher order modulation methods and additional data channels require advanced receiver structures and good quality signal estimates. Multipath radio channel disperses the signal energy in time, and in the receiver, finger allocation algorithm is needed to find the timing instants containing resolvable signal components. We present two finger allocation methods which offer fast response to the changes in channel, collect the most of the signal energy, and still keep the computational burden within limits. The receiver uses a chip rate minimum mean-squared error frequency domain equalizer (MMSE-FDE) for detection of the signal. Avoiding the Rake type two-phase finger allocation and tracking, we employ the impulse response measurement (IRM) values for finger allocation. Fingers are frequently re-allocated, and no separate finger tracking is needed. Allocation takes place either based on a threshold comparison, or by attempting to maximize the collected signal energy with a fixed number of fingers. These methods can also be combined. Performance results of the finger allocation algorithms are provided via simulations, and also a complexity comparison between the presented methods is given.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publicationIEEE Vehicular Technology Conference, VTC Fall 2011
PublisherInstitute of Electrical and Electronic Engineers IEEE
Number of pages5
ISBN (Electronic)978-1-4244-8327-3
ISBN (Print)978-1-4244-8328-0
DOIs
Publication statusPublished - 2011
MoE publication typeA4 Article in a conference publication
Event74th IEEE Vehicular Technology Conference, VTC Fall 2011 - San Francisco, United States
Duration: 5 Sep 20118 Sep 2011
Conference number: 74

Conference

Conference74th IEEE Vehicular Technology Conference, VTC Fall 2011
Abbreviated titleVTC Fall 2011
CountryUnited States
CitySan Francisco
Period5/09/118/09/11

Fingerprint

Code division multiple access
Equalizers
Impulse response
Modulation

Keywords

  • finger allocation
  • HSUPA
  • frequency domain processing
  • MMSE equalization

Cite this

Hahtola, P., & Moilanen, I. (2011). Finger allocation for advanced WCDMA uplink. In Proceedings: IEEE Vehicular Technology Conference, VTC Fall 2011 Institute of Electrical and Electronic Engineers IEEE. https://doi.org/10.1109/VETECF.2011.6093039
Hahtola, Paavo ; Moilanen, Ilkka. / Finger allocation for advanced WCDMA uplink. Proceedings: IEEE Vehicular Technology Conference, VTC Fall 2011. Institute of Electrical and Electronic Engineers IEEE, 2011.
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Hahtola, P & Moilanen, I 2011, Finger allocation for advanced WCDMA uplink. in Proceedings: IEEE Vehicular Technology Conference, VTC Fall 2011. Institute of Electrical and Electronic Engineers IEEE, 74th IEEE Vehicular Technology Conference, VTC Fall 2011, San Francisco, United States, 5/09/11. https://doi.org/10.1109/VETECF.2011.6093039

Finger allocation for advanced WCDMA uplink. / Hahtola, Paavo; Moilanen, Ilkka.

Proceedings: IEEE Vehicular Technology Conference, VTC Fall 2011. Institute of Electrical and Electronic Engineers IEEE, 2011.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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Hahtola P, Moilanen I. Finger allocation for advanced WCDMA uplink. In Proceedings: IEEE Vehicular Technology Conference, VTC Fall 2011. Institute of Electrical and Electronic Engineers IEEE. 2011 https://doi.org/10.1109/VETECF.2011.6093039