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Research on the Estimation Model of TDOA in the Multiplex System

Author: YiLiFeng
Tutor: LiYiBing
School: Harbin Engineering University
Course: Communication and Information System
Keywords: Composite system Link Sequence Cyclic spectrum analysis TDOA estimates DSP
CLC: TN98
Type: Master's thesis
Year: 2007
Downloads: 149
Quote: 0
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Abstract


Spread spectrum technology has a strong anti-interference ability , low probability , high range discrimination , good code division multiple access communication ability and good communication confidentiality and other characteristics intercepted in the military / civilian communications and telemetry, positioning fields has been widely used. Completed in the past , however , spread spectrum communication and positioning task is to work independently of the system , system complexity , cost , and system electromagnetic interference is not conducive to the spread-spectrum technology widely promoted . To this end, this paper proposes a new structure of the system - the complex system , that the system can be completed at the same time spread spectrum communication and ranging tasks , and better solution to simply bring together two separate subsystems composite drawbacks. In this paper, the application of the special structure of the sequence - the link sequence double-precision dual range ranging , while application of the a soft spread spectrum technology to achieve high rates of spread spectrum communication . Signal processing level , the application of cyclic spectrum analysis theory combined TDOA estimation algorithm, to improve the performance of complex systems ranging and communication . Initially envisaged application / string combination of phase sequence capture , in order to achieve real - time ranging and high rates of spread spectrum communication . The papers in the previous chapters theoretical analysis and deduced on the basis of the time of preparation and data flow of the application of MATLAB simulation software program , the technical performance of the system simulation, results show that the composite system is better able to complete the system design specifications ; completed at the same time expanding frequency communication and ranging tasks , high precision , large range , real-time ranging system to work under harsh channel environment . And the development of key technologies implemented in the DSP hardware platform , but also laid a solid foundation for the further promotion of technology .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radio , telecommunications, measurement techniques and instruments
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