Research On The Estimation Model Of TDOA In The Multiplex System

The Spread Spectrum technology has got wide usage upon communications, telemetry, and orientation because of its strong anti-interference ability, low probability of being intercepted and captured, strong discrimination ability, outstanding multi-access communication ability, and excellent secrecy.However, previously the SS system was only used separately in communications or orientation systems. Then the complexity, cost, and interference amongst different systems will affect the application of the SStechnology. Therefore, this paper proposed a new system: the multiplex system, which can finish the communication and the telemetry simultaneously, and can also overcome the disadvantages of combining the two systems directly. The paper also bring out using a special structure serial, the concatenate serial, to measure with double precision range, and at the same time realizing high speed SS communication with tamed-SS technology. Moreover, it gives the TDOA arithmetic on the base of circulation spectrum, which can enhance the communication and telemetry ability of the system. Basically the paper configured to use series-parallel ways to accomplish quick phase capture, and therefore realize telemetry and communication at the same time.The paper gives the simulation ways of MATLAB and DSP. And the simulation results show that the complex system can realize the theoretical target, including communication and telemetry simultaneously, finishing real-time measuring with high accuracy and huge range, realizing system function in unrealistic circumstances.