Low-power adaptive pseudo noise code acquisition for spread-spectrum systems

Mau L. Wu*, Kuei-Ann Wen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A novel pseudo noise code acquisition combined with the newly proposed adaptive sampling rate and threshold control (ASTC) algorithm is derived for low-power spread-spectrum systems with complementary metal-oxide-semiconductor implementations. Low-power performance can be achieved by reducing the sampling rate of the proposed system while maintaining the system performance. The sampling rate is dynamically updated due to the change of the channel noise level. Under the assumptions that the channel is additive white Gaussian noise slow-fading channel, up to 74.3% reduction in power consumption compared to the conventional fixed-sampling rate and fixed-threshold architecture is demonstrated with insignificant increase of system complexity. The proposed architecture can be applied to the design of low-power and controllable- performance spread-spectrum communication systems.

Original languageEnglish
Pages (from-to)748-760
Number of pages13
JournalIEEE Transactions on Wireless Communications
Volume1
Issue number4
DOIs
StatePublished - 1 Dec 2002

Keywords

  • Adaptive computing
  • Code acquisition
  • Communication
  • Low-power design
  • Spread spectrum

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