Frequency domain approach to channel estimation and signal detection in HSUPA

Ilkka Moilanen, Paavo Hahtola, Jukka Törmälehto

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


    In high speed uplink packet access (HSUPA), higher order modulation methods are one possible solution to support increased peak data rate requirements at high signal-to-interference-plus-noise ratios (SINR). Multipath propagation affects peak data rate performance. At high SINR, relatively large number of multipath components can be exploited for signal detection. It is computationally more cost-efficient to exploit such a number of diversity components in the frequency than in the time domain. Therefore, we have chosen an advanced receiver structure, in which frequency domain processing is utilized. We introduce simple finger allocation and channel estimation algorithms based on the frequency domain despreading. They are proven to offer good performance throughout the receiver stages. To combat intersymbol interference (ISI), single-user chip-level frequency domain equalizer (FDE) is used to detect the high data rate users. Parallel interference cancellation (PIC) is applied in the frequency domain to suppress the interference from data users to speech users. The performance of the whole receiver chain is presented as a function of the number of the fingers, which illustrates the demand for low complexity frequency domain processing. In particular, the simple finger allocation, where a sub-window of consecutive fingers is allocated, is an interesting option for the high SINR region.
    Original languageEnglish
    Title of host publicationProceedings
    Subtitle of host publicationIEEE Vehicular Technology Conference, VTC Fall 2011
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Number of pages5
    ISBN (Electronic)978-1-4244-8327-3
    ISBN (Print)978-1-4244-8328-0
    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 Sept 20118 Sept 2011
    Conference number: 74


    Conference74th IEEE Vehicular Technology Conference, VTC Fall 2011
    Abbreviated titleVTC Fall 2011
    Country/TerritoryUnited States
    CitySan Francisco


    • HSUPA
    • frequency domain processing
    • channel estimation
    • MMSE equalization
    • interference cancellation
    • turbo coding


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