Optimal and suboptimal linear receivers for impulse radio UWB systems

Sinan Gezici, H. Vincent Poor, Hisashi Kobayashi, Andreas F. Molisch

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

2 Scopus citations


The high time resolution of ultra-wideband (UWB) signals results in a large number of multipath components (MPCs) arriving at the receiver, which presents a source of diversity. In addition to this multipath diversity, there is also repetition diversity inherent in impulse radio (IR) UWB systems, since a number of pulses are transmitted for each information symbol. In order to make optimal use of both multipath and repetition diversity, the receiver needs to consider the optimal combination of contributions from both different frames and different MPCs. In this overview paper, the optimal linear receiver for a given user in a frequency-selective multiuser environment, which combines all the samples from the received signal according to the minimum mean square error (MMSE), criterion is studied. Due to the complexity of this optimal receiver, two suboptimal receivers with lower complexity are considered, optimal frame combining (OFC) and optimal multipath combining (OMC) receivers, which reduce computational complexity by suboptimal combining in the multipath diversity and repetition diversity domains, respectively. Finally, a two-step MMSE algorithm which reduces complexity by performing MMSE combining in two steps is presented, and its optimality properties are discussed. Simulations are performed to compare the performance of different receivers.

Original languageEnglish (US)
Title of host publicationICUWB2006
Subtitle of host publication2006 IEEE International Conference on Ultra-Wideband - Proceedings
PublisherIEEE Computer Society
Number of pages6
ISBN (Print)142440102X, 9781424401024
StatePublished - Jan 1 2006
EventICUWB2006: 2006 IEEE International Conference on Ultra-Wideband - Waltham, MA, United States
Duration: Sep 24 2006Sep 27 2006

Publication series

NameICUWB2006: 2006 IEEE International Conference on Ultra-Wideband - Proceedings


OtherICUWB2006: 2006 IEEE International Conference on Ultra-Wideband
Country/TerritoryUnited States
CityWaltham, MA

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering


  • Diversity
  • Impulse radio (IR)
  • MMSE combining
  • Rake receiver
  • Ultra-wideband (UWB)


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