Adaptive frequency-selecting scatter communication modem

The utility model discloses a self-adaptive frequency-selecting scatter communication modem, which relates to scatter communication modems using self-adaptive frequency-selecting technology in the technical field of communication. The utility model is composed of an auxiliary multiplexer-demultiplexer, a channel detector, a detection signal generator, a modem, a communication controller, a digital phase locked loop, an A/D converter, a D/A converter, a local oscillation module, a mixer, a filtering amplifier and other components. The utility model uses the self-adaptive frequency-selecting technology for enabling a scatter communication system to always work on the optimum frequency of a current channel, and the utility model has the strong performance of channel fading resistance. The utility model also has the characteristics of simplified appliance structure compared with a traditional MIMO technical structure, obviously reduced cost, small volume, light weight, reliable performance, obviously enhanced maneuvering capability, etc. The utility model is especially suitable for being used as a modem device in scatter communication systems with medium and small capacity.