AMBEサーバーのしくみ - jr1ofp.web.fc2.com

1 1 AMBE JR1 OFP 2018 4 8 2 AMBE ThumbDV AMBE ThumbDV AMBE tumbDV B+ 2 3 Linux AMBE server Windows 7 or 8 or 10 Windows BlueDVAMBE server 3 AMBE BB ( ) ( ) ( ) (Port 2461) TumbDV COM AMBE ( (PORT) (IP) UDP 2461 => BlueDVAMBE XRF085 4 BB IP BlueDVAMBE AMBE 5 --- PCM (Pulse Code Modulation) PCM 1 8000 125 S ) 8 --- 8 x 8000 / = 64000 / (64 Kbps) 6 D-Star (1) RTTY (2) PSK31 (3) JT65 (4) D-Star (5) C4FM D-Star C4FM 144 MHz 430 MHz 1200 MHz D-Star C4FM FSK (GMSK) 6kHz 4 FSK 16kHz AMBE +FEC= ( 48bit/20ms) AMBE+2(Half-Rate) +FEC= AMBE+2(Full-Rate) +FEC= ( Half: 49bit/20ms , Full: 88bit/20ms ) ( ) ( ) ( ) ( ) FSK: Frequency Shift Keying, FEC.

2 Forward Error Correction ) 7 D-Star DVS AMBE 8 AMBE 1. XRF085 (128kbps) D-Star ( ) D-Star ( ) AMBE + AMBE3000 A/D AMBE 16-bit linear PCM data sampled at 8 kHz = 128kbps D-Star AMBE + FEC = FEC: Forward Error Correction --- D-Star Android / ( BlueDVAMBE) 9 AMBE XRF085 (128kbps) D-Star ( ) D-Star ( ) AMBE D-Star D-Star AMBE D-Star ( ) (128kbps) D/A Android / ( BlueDVAMBE).

3 + AMBE3000 10 AMBE AMBE AMBE 10MB AMBE XRF WiFi WiFi AMBE AMBE LAN USB-LAN LAN BlueDVAMBE 11 AMBE AMBE3000 O zeroW AMBE zeroW AMBE3000 GPIO AMBE GPIO DVSI AMBE3000R LSI ThumbDV AMBE AMBE GPIO BlueDV Interface USB PC BlueDV for Windows (AMBE3000 ( zeroW))