Evaluation of FLDPC Coding Scheme for Adaptive Coding in Aeronautical Telemetry

The aeronautical telemeter channel is characterized by Multipath interference, Doppler shift and rapid changes in channel behavior. In addition to transmission error during aeronautical telemeter, transmission losing also exists. In this paper, we investigate the correction of transmission error and processing of telemetry transmission losing, and propose an adaptive coding scheme, which organic combines Fountain code and low density parity check (LDPC) code. We call it fountain LDPC (FLDPC) coding. In the coding scheme, The LDPC code is explored to perform transmission error correction, while, the problem of transmission losing is resorted to fountain code. So FLDPC is robust for transmission losing and transmission error. Moreover, without knowing any of these the channel information, FLDPC can adapt the data link and avoid the interference through adjusting the transmission rate. Experimental results illustrated that a signification improvement in transmission reliability and transmitting efficiency can be achieved by using the FLDPC coding.