Signal Receiving Technology For Meteor Burst Communication And FPGA Implement

Because of the fast fading characteristic of meteor burst channel, the received power from a meteor trail decays rapidly, generally exponentially, and the trail has a short life time. These facts cause the throughput, i.e. average number of bits per second, to be fairly low relative to other systems. In order to make full use of the meteor trail. adaptive threshold detection and adaptive variable rate transmission is studied in this paper.Firstly, the development of Meteor Burst Communication (MBC) and the properties of the meteor burst channel are introduced. Based on the research of two adaptive threshold detection schemes, a scheme with parallel detection is presented in Section II. Computer simulations show that the detection probability is improved by using this method when the channel is in poor condition. In Section III, three types of adaptive variable rate schemes are introduced. An adaptive variable rate scheme based on modulation and coding is confirmed according to the complexity. Its work process, rate detection and switching threshold determination is then developed in detail. The FPGA design using top-down and modularization method is implemented on the chip of Altera’s Cyclone II EP2C50with VHDL. Finally, the efficiency of the scheme is demonstrated by the results of transmission test in laboratory and field.