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Study - B-VHF
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The "narrowband" DSB-AM VHF communications are essential for the ATC, but the aeronautical spectrum (118- 137 MHz) in Europe is almost congested. Recently introduced 8.33 kHz system will not be able to provide communications resources required after 2010. Currently, no agreed long-term European solution exists.
Within EC FP6, Frequentis has launched an R&D proposal named "B-VHF" (Broadband VHF), with the aim to investigate the potential of the 4G MC-CDMA technology to be used in an aeronautical environment. The idea behind the B-VHF is to re-use parts of the VHF spectrum that have either been allocated, but are not effectively used within a given region, or belong to other "far" regions (the corresponding "weak" narrowband signals do not jam an MC-CDMA receiver). The MC-CDMA organises such non-contiguous spectrum parts into single "broadband VHF channel", while simultaneously excluding known "near" narrowband channels. By this way, the B-VHF system can be operated without interference with the "co-located" legacy DSB-AM system.
Sketch of Block Diagram
The main expected benefits from B-VHF are easy transition, increased capacity, improved QoS, improved safety and security due to the B-VHF robustness against narrowband jammers and phantom controller's attacks.
Abbreviations:
- DSB-AM: Double Side Band - Amplitude Modulation
- FP6: 6. Framework Programme
- MC-CDMA: Multi Carrier - Code Division Multiple Access
- VHF: Very High Frequency
- 4G: Fourth Generation
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