Accession Number:

ADA413716

Title:

Near-Far Resistance of Multicarrier CDMA Systems

Descriptive Note:

Conference paper

Corporate Author:

CINCINNATI UNIV OH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING AND COMPUTER SCIENCE

Personal Author(s):

Report Date:

2002-11-01

Pagination or Media Count:

6.0

Abstract:

Multicarrier MG CDMA systems have been developed and rapidly gained popularity as they capitalize on both MCM multicarrier modulations resilience to MUI and direct-sequence DS CDMAs robustness against frequency selectivity to mitigate both MUI and the inter-symbol interference ISI caused by time dispersive channels. However, the well-known near-far problem in a multiuser setting still places fundamental limitations on the performance of MC-CDMA communication systems, and this issue has been considered by very few papers. In this paper the theoretical near far resistance of the MMSE detector in the uplink MC-CDMA with and without cyclic prefix CP setting is derived. It turns out that the near-far resistance of MC-CDMA without CP has the same form as that of the DS-CDMA except that the user codes are IFFT transformed. Our formulation for the near-far resistance is applied to either blind or non-blind MMSE detectors. Computer simulations confirm theoretical findings.

Subject Categories:

  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE