Probabilistic spherical detection and VLSI implementation for multiple-antenna systems

Chester Sungchung Park, Keshab K. Parhi, Sin Chong Park

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


This paper presents a novel probabilistic spherical-detection (P-SD) method which applies the probabilistic-search algorithm to conventional depth-first SD (DF-SD). By confining the tree search into candidates which can be selected in an adaptive manner, a large number of promising candidates can be evaluated before termination. Consequently, the proposed P-SD improves the error performance of DF-SD with early termination, while retaining the hardware efficiency. An efficient VLSI architecture is proposed for implementation of the P-SD algorithm, and the results of the synthesized architecture are presented. The main advantage of P-SD is that it can fully exploit the state-of-the-art architectures of DF-SD, since it can be implemented by simply adding two functional blocks to conventional DF-SD. By analyzing the performance-complexity tradeoffs, it is concluded that our proposed P-SD is advantageous over conventional DF-SD and K-best algorithm, when the maximum-likelihood error performance is desired.

Original languageEnglish (US)
Pages (from-to)685-698
Number of pages14
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Issue number3
StatePublished - Apr 6 2009


  • Adaptive signal processing
  • CMOS digital integrated circuits
  • Maximum-likelihood (ML) detection
  • Multiple-input-multiple-output (MIMO) systems

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