REDUCED COMPLEXITY EQUALISATION IN CDMA WITH IMPULSE RESPONSE SHORTENING

Channel estimation and/or equalization processing is performed in a wireless receiver in two stages. The first stage involves pre-filtering in the frequency domain to compact a grid-based representation of the net channel. The second stage involves implementing reduced-complexity time domain channel...

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Bibliographic Details
Main Authors WALLÉN, Anders, CAIRNS, Douglas A, REIAL, Andres
Format Patent
LanguageEnglish
French
German
Published 31.01.2018
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:Channel estimation and/or equalization processing is performed in a wireless receiver in two stages. The first stage involves pre-filtering in the frequency domain to compact a grid-based representation of the net channel. The second stage involves implementing reduced-complexity time domain channel estimation and/or equalization. According to one embodiment, a received signal transmitted over a net channel is processed by pre-filtering the received signal in the frequency domain. The frequency domain pre-filtering compacts an N-tap effective grid-based representation of the net channel into a K-tap compacted grid-based representation of the net channel where K<N. The pre-filtered received signal is equalized in the time domain based on the K-tap compacted grid-based representation of the net channel generated by pre-filtering the received signal in the frequency domain.
Bibliography:Application Number: EP20100739704