New FEC Schemes for Aeronautical TM
Project Award Date: 05-01-2006
While data requirements grow for flight testing, the electromagnetic spectrum allocated to aeronautical telemetry continues to shrink. Researchers are diligently working to improve the spectral and detection efficiencies of aeronautical telemetry.
Forward error correction (FEC) codes offer one possible means of improving detection efficiency. For FEC schemes to be viable options in the telemetry setting, they must provide large coding gains with minimal bandwidth expansion and be implementable in the field An FEC scheme where the modulation itself is treated as a code is proposed here. This new technology will provide increased spectral and detection efficiency for aeronautical telemetry over previous approaches where the modulation and demodulation operations have been treated independent from the coding scheme. The proposed approach exploits the memory inherent in the modulation itself and opens the possibility of achieving very large coding gains, on the order of 9 dB, with high-rate (i.e. minimal bandwidth expansion) FEC codes. Such performance gains can be used to extend the operating range of the modulations or improve the quality of the data. These FEC schemes can be used in traditional and packet-based telemetry links.
Primary Sponsor(s): U.S. Air Force/U.S. Army