Robust PACKET

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PACKET - Robust PACKET

Robust PACKET
Robust PACKET.jpg
Frequencies 3.61 MHz,7.0473 MHz,10.1473 MHz,14.1033 MHz
Frequency Range 3.61 MHz - 14.1033 MHz
Mode USB
Modulation PSK,OFDM
ACF
Emission Designator
Bandwidth 500 Hz
Location Worldwide
Short Description Robust PACKET, also known as HF-APRS, RPR, Winlink RMS, and APRSlink, is an OFDM version of the amateur mode PACKET which is optimized for shortwave use. This mode was developed by Spezielle Communications Systeme GmbH & Co. KG (SCS).
I/Q Raw Recording
Audio Sample

Robust PACKET, also known as HFHigh Frequency (3-30 MHz)-APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area, RPR, Winlink RMS, APRSlink, RPR-HFHigh Frequency (3-30 MHz)-APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area, and SCS Robust Packet, is an OFDMOrthogonal Frequency-Division Multiplexing version of the amateur mode PACKET optimized for shortwave use. This mode was developed by Spezielle Communications Systeme GmbH & Co. KG (SCS), who developed the PACTOR protocol.

Robust PACKET uses 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). of bandwidth with 60 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). spacing between carriers, and uses OFDMOrthogonal Frequency-Division Multiplexing with 8 DBPSK or DQPSKDifferential Quadrature Phase-Shift Keying carriers. On 200 bpsBits per second (bps) mode, it uses BPSKBinary Phase-Shift Keying (1 bit per symbol). For 600 bpsBits per second (bps) mode, DQPSKDifferential Quadrature Phase-Shift Keying is used. For both modes, each subcarrier runs at a constant rate of 50 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second..

Like PACKET, Robust PACKET uses the AX-25 frame protocol for transmitting data. Compared to PACKET, Robust PACKET has better resistance against multipath propagation and fading. In addition, Robust PACKET takes less total bandwidth, with sidebands only extending out to 500 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)., where with PACKET, the sidebands produced from the 300 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. FSKFrequency-Shift Keying extend as far as 730 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz)..

This mode is available only on SCS's 'Tracker / DSP TNC'


Samples[edit]


Frequencies[edit]

Robust Packet can be found Worldwide on 10147.3 kHzKiloHertz (kHz) 10^3 Hz in the 30m b band.

In certain regions such as Europe, it can be found at additional frequencies: 14103.3 kHzKiloHertz (kHz) 10^3 Hz (20m), 7047.3 kHzKiloHertz (kHz) 10^3 Hz (40m), and 3610 kHzKiloHertz (kHz) 10^3 Hz (80m)

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