The Ranging Technology Research Of The CMMB Signal

In order to make the city complex environment in the navigationg problems getwell solve.In recent years the dovelopment trend of the technology of navigation andpositioning from excessive GNSS has navigation satellite and ground stations withsignal joint orientation navigation technology. Along with the digital TV technologyin our country’s popularity,using a digital TV signal radio navigation become apopular research poiont. In2006, the national administration of radio,issued andpopularize the CMMB standards(GY/T220.12006). For this background, this paperlaunched innovative research and lays a foundation for the application of CMMB inthe navigation reasearch.This thesis passes the thorough analysis to the CMMB signal systemcharacteristics in navigating the foundation that the fixed position method carries onanalysis summary at present to the main wireless, at not the change moved thepremise bottom of multi media signature tune to put forward CMMB to navigate tomeasure to be apart from a method and developed to measure to be apart from processin of some key technique research, and further carried on research and experimentverification to method and possibility that CMMB navigates a fixed position on thisfoundation.The work that this thesis mainly completes has a few aspects as follows:(1)Analyzed to navigate the development present condition and achievement oftechnique research at home and abroad. Navigating to position calculate way anddrawing lessons from GNSS to navigate to position through more existing radio signalis technical of related principle, combine the analysis to the CMMB signal system,tally up and put forward to navigate to measure to be apart from a method accordingto Chinese ambulation multimedia broadcasting of CMMB signal;(2)Pass structural to the CMMB signal of go deep into analysis and make understandof way to OFDM, put forward false method of problem for being apart from tomeasure medium frequency to be partial to move key technique problems, such asestimate and repair...etc., passing to imitate true analysis to put forward to understandCMMB signal to definitely measure to be apart from a key technique of CMMB;(3)Make use of FPGA and DSP to build the CMMB signal fixed position receiverexperiment platform, and succeeded in catching, followed part to carry on to imitateto the CMMB signal really, get CMMB signal of false be apart from to measure the error margin and result in the process.Should verify a thesis to put forward further as aresult of measure the possibility of being apart from the method according to theCMMB ambulation multi media signature tune, and the accuracy of key calculate waydesigned by thesis.