Adaptive decorrelating detectors for CDMA channels

Urbashi Mitra, H. Vincent Poor

Research output: Contribution to conferencePaperpeer-review


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)
Number of pages5
StatePublished - 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


OtherProceedings of the 1995 IEEE International Conference on Communications. Part 1 (of 3)
CitySeattle, WA, USA

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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