An efficient implementation of PRACH generator in LTE UE transmitters

Ying He*, Jian Wang, Yongtao Su, Eryk Dutkiewicz, Xiaojing Huang, Jinglin Shi

*Corresponding author for this work

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

8 Citations (Scopus)

Abstract

An efficient hardware-optimized Physical Random Access Channel (PRACH) baseband signal generation algorithm and its ASIC implementation in the LTE user equipment (UE) transmitter are presented in this paper. A simplified DFT of the Zadoff-Chu (ZC) sequence as well as a phase computation are applied to the prime size DFT of the PRACH preamble and the large size IDFT is accomplished by groups of smaller size IFFTs. The optimized algorithm achieves significantly lower computational complexity compared with the original algorithm in the LTE specification and better performance compared to another publication. The ASIC architecture is also designed to reduce the memory size and logic complexity, which achieves a low hardware cost in terms of the cell area. The proposed design was implemented in 65nm CMOS and it was demonstrated that this design can satisfy the timing requirements of the LTE specification.

Original languageEnglish
Title of host publicationIWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages2226-2230
Number of pages5
ISBN (Print)9781424495399
DOIs
Publication statusPublished - 2011
Event7th International Wireless Communications and Mobile Computing Conference, IWCMC 2011 - Istanbul, Turkey
Duration: 4 Jul 20118 Jul 2011

Other

Other7th International Wireless Communications and Mobile Computing Conference, IWCMC 2011
CountryTurkey
CityIstanbul
Period4/07/118/07/11

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