Application of Multicarrier 2-Dimension Spread Spectrum in Aerospace TTC

摘要

Application of multicarrier 2-dimension spread spectrum (MC-2D-SS) is proposed in the field of aerospace TT&C systems to enhance their resistance to interference during mission operations.In principle,MC-2D-SS is the combination of direct sequence spread spectrum (DS-SS) and multicarrier CDMA (MC-CDMA).Therefore,it has both the characteristics of signal hiding of DS-SS and anti-inter-symbol interference (ISI) and anti-interference of MC-CDMA.A design of transmitter and receiver using MC-2D-SS is given for aerospace TT&C.Discussion is given to key technical issues of design,e.g.synchronization,ranging,anti inter-ference and channel estimation,and a rough synchronization scheme is recom-mended.As a result,the TT&C system not only fully meets mission operation requirements,but also has high spread spectrum gain,strong anti-interference performance,ISI resistance capability and adaptive transmission characteristics.