Direct-Sequence Systems

  • Don Torrieri
Chapter

Abstract

A spread-spectrum signal is one with an extra modulation that expands the signal bandwidth greatly beyond what is required by the underlying coded-data modulation. Spread-spectrum communication systems are useful for suppressing interference, making secure communications difficult to detect and process, accommodating fading and multipath channels, and providing a multiple-access capability. Spread-spectrum signals cause relatively minor interference to other systems operating in the same spectral band. The most practical and dominant spread-spectrum systems are direct-sequence and frequency hopping systems.

Keywords

Covariance Autocorrelation Convolution 

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Don Torrieri
    • 1
  1. 1.US Army Research LaboratoryAdelphiUSA

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