UMTS FDD frequency domain equalization based on self cyclic reconstruction

Yushan Li, Steve McLaughlin, David G M Cruickshank

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


In this paper, a new chip-level MMSE frequency domain equalizer (FDE) is investigated for the downlink frequency division duplex (FDD) mode in UNITS (Universal Mobile Telephone System). The multiple access interference (MAI) and inter chip interference (ICI) can be reduced at the chip level before despreading. For frequency domain equalization, the cyclicity of the received block signal needs to be reconstructed if neither cyclic prefix nor zero-padding are used at the transmitter. We exploit the relationship between the reconstructed part and the equalized signal itself and derive a self cyclic reconstruction scheme. Performance of the proposed MMSE-FDE is shown by computer simulations, compared with performance of FDE with perfect reconstructions. It is shown that the conventional time domain equalization can be implemented in the frequency domain, thus a multimode receiver that can handle both UNITS and OFDM systems in one equalization structure is feasible.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications, 2005
Number of pages5
ISBN (Print)0-7803-8938-7
Publication statusPublished - 2005
EventIEEE International Conference on Communications 2005 - Seoul, Korea, Democratic People's Republic of
Duration: 16 May 200520 May 2005


ConferenceIEEE International Conference on Communications 2005
Abbreviated titleICC 2005
Country/TerritoryKorea, Democratic People's Republic of


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