Comparative Evaluation of the Performance Indicators of Devices for Fast Sequences Delay

摘要

Considered are asynchronous address and control-measurement systems using complex coded signals. This work is devoted to the analysis of indicators for performance estimation of the processing method and delay acquisition devices. The problem arises when using long code sequences in conditions of limited signal observation time and high requirements to reliability and synchronization accuracy. In these conditions use of various non-optimal methods and search algorithms, in particular, sequential-parallel search, consecutive algorithms of decision making based on a sequence segment, separate processing of components of the accepted combined sequences is limited because of decrease in energy efficiency, or complication of systems implementation. The code delay acquisition performance can be characterized by acquisition devices structure and selection of the search strategy. Also required indicators allow evaluating and comparing the performance of different initial synchronization approaches under different system parameters and channel conditions. This paper is devoted to search and analyze performance indicators of processing method and search device model that is close in energy efficiency to the optimal scheme, and also comparable to estimation of these fast conversions effectivity. It is shown that the proposed indicators are proof a gain on mean acquisition time for the offered versions of the scheme of delay acquisition. Presented results will be useful to the specialists who are engaged in design of the asynchronous-address systems using aggregate signals with large base.