Pre-Rake diversity combining for UWB systems in IEEE 802.15 UWB multipath channel

Shunsuke Imada, Tomoaki Ohtsuki

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

44 Citations (Scopus)

Abstract

Since Ultra Wideband Impulse Radio (UWB-IR) systems can resolve many paths and are thus rich in multipath diversity, the use of the Rake diversity combining is very effective. In the Rake diversity combining, the bit error rate (BER) is improved with the increase of the number of fingers. The Pre-Rake diversity combining is known as another technique to achieve the performance equivalent to the Rake diversity combining without increasing the receiver complexity. In the Pre-Rake diversity combining, the transmitted signals are scaled and delayed according to the delay and strength of the multipath. In this paper, we propose the Pre-Rake diversity combining techniques for UWB systems, the All-Pre-Rake (A-Pre-Rake) diversity combining using perfect channel information, the Selective-Pre-Rake (S-Pre-Rake) diversity combining using the information on the L strongest paths, and the Partial-Pre-Rake (P-Pre-Rake) diversity combining using the information on the first L paths. From the results of our computer simulation for UWB-IR systems in IEEE 802.15 UWB multipath channel model, we show that the proposed Pre-Rake diversity combining techniques are effective for the UWB-IR systems to achieve good error rate performance, while keeping the complexity of the receiver low. We also show that the S-Pre-Rake diversity combining is effective to achieve good error rate performance with less amount of the channel information.

Original languageEnglish
Title of host publication2004 International Workshop on Ultra Wideband Systems; Joint with Conference on Ultra Wideband Systems and Technologies, Joint UWBST and IWUWBS 2004
Pages236-240
Number of pages5
Publication statusPublished - 2004 Dec 1
Externally publishedYes
Event2004 International Workshop on Ultra Wideband Systems; Joint with Conference on Ultra Wideband Systems and Technologies, Joint UWBST and IWUWBS 2004 - Kyoto, Japan
Duration: 2004 May 182004 May 21

Publication series

Name2004 International Workshop on Ultra Wideband Systems; Joint with Conference on Ultra Wideband Systems and Technologies, Joint UWBST and IWUWBS 2004

Other

Other2004 International Workshop on Ultra Wideband Systems; Joint with Conference on Ultra Wideband Systems and Technologies, Joint UWBST and IWUWBS 2004
CountryJapan
CityKyoto
Period04/5/1804/5/21

Keywords

  • PreRake diversity combining
  • Rake diversity combining
  • UWB

ASJC Scopus subject areas

  • Engineering(all)

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    Imada, S., & Ohtsuki, T. (2004). Pre-Rake diversity combining for UWB systems in IEEE 802.15 UWB multipath channel. In 2004 International Workshop on Ultra Wideband Systems; Joint with Conference on Ultra Wideband Systems and Technologies, Joint UWBST and IWUWBS 2004 (pp. 236-240). (2004 International Workshop on Ultra Wideband Systems; Joint with Conference on Ultra Wideband Systems and Technologies, Joint UWBST and IWUWBS 2004).