Research Of Spacecraft Capsule Channel Modelling And UWB Signal Synchronous Algorithm

This paper mainly discusses the research of space capsule channel modelling andsynchronous theory. Because the spacecraft taking more and more tasks, it will launchmore loads, the capacity of spacecraft are considered. However, the spacecraft capsuleare occupied and overweight, and it may use high-speed wireless communicationsinstead of the original spacecraft capsule communications. It is a good way not onlysave weight on the rocket system, but also get ready for further deeply spaceexploration. This paper studies for spacecraft capsule internal communications, and themain contents are arranged as following:Firstly, this paper talks about the inner spacecraft capsule communications system,the transmission signals are using the basic theory of UWB signals.The receivertheory based on ultra-wideband receiver system, then take the theory and simulation ofthe two receiving program.Secondly, this paper analysis the existing indoor channel model, S-V model, thenextended the channel model to which is matched to UWB signal, finally conclude aspacecraft capsule communications channel model, format two model as line of sightand non-line of sight channel and stipulate its parameters and simulation.Thirdly, based on above analysis, the paper talks about synchronizationtechnology in spacecraft capsule communication. Firstly analysis the basic pilotsynchronization algorithm, then we proposed an LS synchronization algorithm, whichcan be match in the proposed spacecraft capsule model, and simulate its performance.