DS-CDMA with frequency-domain equalization for high speed downlink packet access

Deepshikha Garg, Fumiyuki Adachi

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)

Abstract

The next generation mobile communications system is anticipated to support data rates up to and exceeding 100Mbps. In this paper, we consider a DS-CDMA high-speed downlink packet access (HSDPA) as in 3G W-CDMA systems. Adaptive modulation and coding (AMC), multicode operation and hybrid automatic repeat request (HARQ) will be the enabling technologies. With such high-speed data transmissions, however, multicode operation severely suffers from destruction of orthogonality among the spreading codes since the wireless channel becomes severely frequency-selective. In this paper, we apply frequency-domain equalization (FDE) instead of conventional rake combining for receiving the packet. It is shown that the use of FDE for the reception of multicode signal gives an improved throughput irrespective of the channel's frequency-selectivity.

Original languageEnglish
Pages (from-to)689-693
Number of pages5
JournalIEEE Vehicular Technology Conference
Volume60
Issue number1
Publication statusPublished - 2004 Dec 1
Event2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States
Duration: 2004 Sep 262004 Sep 29

Keywords

  • AMC
  • DS-CDMA
  • HARQ
  • HSDPA
  • MMSE-FDE
  • Multicode

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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