Terminology » Other Wireless » B-AMC (Broadband Aeronautical Multi-carrier Communication)

B-AMC (Broadband Aeronautical Multi-carrier Communication)

aeronautical communication

broadband

multi-carrier communication

ofdm

l-dacs

B-AMC stands for Broadband Aeronautical Multi-carrier Communication. It’s a proposed technology for L-DACS (L-band Digital Aeronautical Communication System).

It’s based on VHF frequencies and is similar to MC-CDMA concepts. The B-AMC spectrum sits between two DME channels, each with a 1MHz bandwidth. B-AMC itself has a spectrum bandwidth of 500KHz.

The specifications for this proposed system are summarized in the table below. It uses OFDM modulation techniques.

The forward link is used for transmissions from the Ground Station to the Aircraft Stations, while the reverse link is used for transmissions from the Aircraft Stations to the Ground Station.

Specifications


Effective bandwidth	500KHz for both forward and reverse link
Subcarrier spacing	10.416KHz
Used subcarrier	48 total
FFT/DFT size	64
Sampling interval	1.5 µS
Sampling frequency	666.6KHz
OFDM symbol duration	96µS
Cyclic prefix	24µS
Total OFDM symbol duration	120 µS
Number of OFDM symbols per frame	54
Data OFDM symbols per frame	48 in the forward link and 50 in the reverse link
OFDM frame duration	6.48ms

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