Non-Coherent Ranging Technology Using Arbitrary Periodical Signal
Jin Wei-dong · Journal of Astronautics · 2013
In TTC system,the less correlation between signals from uplink and downlink,the more flexibility is provided for signal system selection.This helps to introduce advance signal transmission and process technique and improve uplink and downlink signal design flexibility.The shortages of conventional coherent and non-coherent ranging technique are analyzed.Based on the phase comparison concept,a non-coherent ranging method using arbitrary periodical signal is derived,and the related range ambiguity and range accuracy affecting ranging characteristics are researched and analyzed.The method is checked by numerical simulation.The result shows that not only uplink and downlink signals can be designed independently,but also the signal systems in uplink and downlink can be combined and utilized in various form to reduce further signal design complexity based on current signal transmission system with the same accuracy requirements.This method can be applied to TTC and information transmission applications for vehicles in space,near space and airspace.