Launchers of digital television have already built in many cities of our country as one of fundamental establishments of
metropolis. The sent signal from launchers is powerful in power, low in frequency and wide in bandwidth, and it also
covers absolutely entire city including many building dense areas. In this paper the signal frame structure of digital
television terrestrial broadcasting (DTMB) standard of our country named GB20600-2006 is analyzed. Then the scheme
measuring the distance with the special discontinuous PN code in the DTMB signal is designed. At last the new method
measuring pseudo-range with DTMB signal is approved considered with DTMB signal own characteristics and tested by
the data gathered at many spots in Xi'an. It provides technique method and supplement on positioning and navigation in
complex circumstance of city.
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