Research And Implementation Of The AMC Of The Wireless Data Distribution System

'KuaiZhou' satellite is a important strategy implementation plan in the development of our country's space system of rapid response operations.And in recent years it plays a more and more important role in many civilian fields such as disaster relief and monitoring.So the research of the related key technologies of communication system is very important and urgent.In this paper,based on the national 863 project,it mainly uses the old wireless data distribution platform which has the function of basic data sending and receiving as the foundation.It improves the data distribution system architecture design,and designs the Adaptive Modulation Coding(AMC)system combined with the platform and implements the Turbo code in the AMC technology.Firstly,it replaces the single-core DSP in the old platform to the double-core fixed floating point C66x series DSP created by TI company latest and reorganizes the link data processing procedure.And it designs connection of the underlying interface and the data transceiver simulation project to test the data transceiver function of hardware platform.Secondly,it researches the AMC technology including channel estimation,clarifying four kinds of modulation and encode plans and tests the performance of each plan to decide the delimit of plan switching.And it designs the parallel implementation plan of AMC system combined with the SYS\BIOS multi-threaded kernel task scheduling function base on the wireless data distribution system.Last but not least,it researches the principle of the Turbo code,which is one of the two kinds of channel coding schema of AMC system and has high performance.And it implements the function of encode and decode of Turbo combined the decode coprocessor in C6657 DSP like TCP3D and VCP2 on the hardware platform.