Comparison between variable and fixed dwell-time PN acquisition algorithmsPseudo noise (PN) spread spectrum systems require a very accurate alignment between the PN code epochs at the transmitter and receiver. This synchronism is typically established through a two-step algorithm, including a coarse synchronization procedure and a fine synchronization procedure. A standard approach for the coarse synchronization is a sequential search over all code phases. The measurement of the power in the filtered signal is used to either accept or reject the code phase under test as the phase of the received PN code. This acquisition strategy, called a single dwell-time system, has been analyzed by Holmes and Chen (1977). A synopsis of the field of sequential analysis as it applies to the PN acquisition problem is provided. From this, the implementation of the variable dwell time algorithm as a sequential probability ratio test is developed. The performance of this algorithm is compared to the optimum detection algorithm and to the fixed dwell-time system.
Document ID
19820060342
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Braun, W. R. (LinCom Corp. Pasadena, CA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Subject Category
Communications And Radar
Meeting Information
Meeting: In: ICC ''81; International Conference on Communications