Unified large-system analysis of MMSE and adaptive least squares receivers for a class of random matrix channels

Matthew J.M. Peacock*, Ian B. Collings, Michael L. Honig

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


We present a unified large-system analysis of linear receivers for a class of random matrix channels. The technique unifies the analysis of both the minimum-mean-squared-error (MMSE) receiver and the adaptive least-squares (ALS) receiver, and also uses a common approach for both random independent, identically distributed (i.i.d.) and random orthogonal precoding. We derive expressions for the asymptotic signal-to-interference-plus-noise ratio (SINR) of the MMSE receiver, and both the transient and steady-state SINR of the ALS receiver, trained using either i.i.d. data sequences or orthogonal training sequences. The results are in terms of key system parameters, and allow for arbitrary distributions of the power of each of the data streams and the eigenvalues of the channel correlation matrix. In the case of the ALS receiver, we allow a diagonal loading constant and an arbitrary data windowing function. For i.i.d. training sequences and no diagonal loading, we give a fundamental relationship between the transient/ steady-state SINR of the ALS and the MMSE receivers. We demonstrate that for a particular ratio of receive to transmit dimensions and window shape, all channels which have the same MMSE SINR have an identical transient ALS SINR response. We demonstrate several applications of the results, including an optimization of information throughput with respect to training sequence length in coded block transmission.

Original languageEnglish (US)
Pages (from-to)3567-3600
Number of pages34
JournalIEEE Transactions on Information Theory
Issue number8
StatePublished - Aug 2006


  • Code-division multiple access (CDMA)
  • Large-system analysis
  • Minimum mean-squared error (MMSE)
  • Multiple-input multiple-output (MIMO)
  • Recursive least squares

ASJC Scopus subject areas

  • Information Systems
  • Computer Science Applications
  • Library and Information Sciences


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