Adaptive decorrelating detectors for CDMA channels

Urbashi Mitra, H. Vincent Poor

Research output: Contribution to conferencePaperpeer-review

Abstract

Multi-user detection allows for the efficient use of band-width in Code-division multiple-access (CDMA) channels through mitigation of near-far effects and multiple-access noise limitations. Due to its inherent noise and multi-path immunity, CDMA multi-access is being considered as a platform for personal communication systems (PCS). As CDMA based digital communication networks proliferate, the need to determine the presence of a new user and integrate knowledge of this new user into the detection scheme becomes more important. The decorrelating detector is a linear multi-user detector that is asymptotically optimal in terms of near far resistance; however, in the presence of a new unknown user, performance of the decorrelator is severely degraded. Adaptive decorrelators are constructed which adaptively augment an existing conventional decorrelator to demodulate a new active user in addition to existing users. Several likelihood ratio based schemes are proposed.

Original languageEnglish (US)
Pages1075-1079
Number of pages5
StatePublished - Jan 1 1995
Externally publishedYes
EventProceedings of the 1995 IEEE International Conference on Communications. Part 1 (of 3) - Seattle, WA, USA
Duration: Jun 18 1995Jun 22 1995

Other

OtherProceedings of the 1995 IEEE International Conference on Communications. Part 1 (of 3)
CitySeattle, WA, USA
Period6/18/956/22/95

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Adaptive decorrelating detectors for CDMA channels'. Together they form a unique fingerprint.

Cite this