Frequency offset compensation with MMSE-MUD for multi-carrier CDMA in quasi-synchronous uplink

Osamu Takyu, Tomoaki Ohtsuki, Masao Nakagawa

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

Multi-Carrier Code Division Multiple Access (MC-CDMA) has been one of the candidates for the next generation wireless communication systems. In an uplink, the MC-CDMA system suffers from the different access timing (asynchronous transmission), the different fading, and the different frequency offsets of each active user. In this paper we analyze the effects of the frequency offset compensation with MMSE-MUD (minimum mean square error based multi-user detection) for MC-CDMA in a quasi-synchronous uplink. We consider the MC-CDMA system with two subcarrier mapping schemes, the continuous mapping scheme and the discrete mapping scheme. From our theoretical analysis and computer simulation, we show that the MMSE-MUD can compensate the different frequency offsets among users. We also show that the MMSE-MUD significantly improves the bit error rate (BER) for the MC-CDMA system with the continuous mapping scheme.

Original languageEnglish
Pages (from-to)2485-2489
Number of pages5
JournalIEEE International Conference on Communications
Volume4
Publication statusPublished - 2003 Jul 18
Externally publishedYes
Event2003 International Conference on Communications (ICC 2003) - Anchorage, AK, United States
Duration: 2003 May 112003 May 15

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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