A FAST CODE ACQUISITION METHOD BASED ON SIGN AND RANK STATICSTICS

摘要

PURPOSE: A method for obtaining a rapid signature sequence based on a code and rank statistics is provided to obtain a test statistic of new detector using an approximate method, enhance detecting performance by deciding a threshold value, and removing a time for an interference variance estimation, thereby reducing an average pseudo noise code obtaining time. CONSTITUTION: New type detector necessary for obtaining a pseudo noise code in a direct sequence band diffusion system is suggested. A method for obtaining a rapid signature sequence based on a code and rank statistics is suggested for inducing a test statistic of a local optimum rank detector and obtaining a test statistic of a local sub optimization rank detector and a deformation code rank detector using an asymptotic approximation. After obtaining a test statistic of new detector using an approximation based on a code and a rank, a threshold value is decided, and a detecting performance is increased and a time necessary for interference variance estimation is removed. Thus, an average pseudo noise code obtaining time is reduced.