Test Of Meteor Burst Communication System And Performance Analysis Of Network

Meteor Burst Communication (MBC) is a perfect emergency communication method, which uses reflection and dispersion of radio wave to the meteor ionization trails. For the design and analysis of MBC systems, the test of transmission experiments in laboratory and field is of great interest.Because of the fading characteristic of the meteor burst channel, the received power from a meteor trail decays rapidly, generally exponentially, and thus has a short life time, consequently, the main problem is to improve the throughput. To mitigate the multi-path interference in meteor communication, full duplex MBC system based on OFDM is presented, which can improve the efficiency of the transmission. In addition, due to the fast fading property of meteor burst trails, an adaptive variable rate scheme is proposed. Then a digital integrated with analog AGC scheme based on power detection in OFDM signals is put forward to reduce the threshold level of system and improve the utilization of the channel. Finally, the efficiency of these technologies is demonstrated by the test results of transmission experiments in laboratory and field. Now, MBC systems can be employed effectively for point-to-point services. For large high-density meteor-burst networks, however, this spatial multiplexing can fail to provide adequate diversity to avoid collisions. By using suitable approximations, the performance of a CDMA system is shown to eliminate collision problems and provide greater total thought than an equivalent data rate narrowband network.