A software-defined GPS receiver design and development is presented in this thesis, based on the technical approach using GPS IF data collector associated with PC-based positioning software.

Realization of a middle frequency high speed data acquiring system in software radio;

The Application of Centralized Data Collector in the Power Communication Management System;

Data collector and book local collection;

This system numbered props by the information button,collected and stored numbers and times by the data collector,and then transmitted data to the management center by M-BUS,so as to realize automatic tracking and processing of prop's information.

This paper presents the agent-based distributed intrusion detection system model-ADIDS,in which data collectors receive request of filter mode from detective agents,decide the range of detection and preprocess data collected,then send data that have preprocessed to detective agents.