An optimum PN code search technique for a given apriori signal location densityA method is presented for optimizing (minimizing) the acquisition time for a PN-type spread spectrum system when the a priori probability density function is not uniform. For an assumed a priori Gaussian density function, calculations show that the acquisition time, when the 0.5 probability acquisition time is used as a measure of acquisition time, is reduced by 40% for a cell detection probability of 0.25 and when three sweeps are used. For the same parameters and with four sweeps the acquisition time is reduced by 41%. When the acquisition time probability is set to 0.9 instead of 0.5, the reduction is 25% of the uniform sweep time.
Document ID
19790056533
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Holmes, J. K. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Woo, K. T. (California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Meeting Information
Meeting: NTC ''78; National Telecommunications Conference