Introduction LoRa Parameter Region/Country Specific 900MHz ISM Freq Band North America (902-928MHz)Europe (863-870MHz) R Data Rate US(902-928): 980bps – 21900bpsEU(863-870): 250bps – 11000bps Bandwidth US(902-928): 125KHz, 500KHzEU(863-870): 125KHz, 250KHz Tx Power US(902-928): 2dBm – 28dBmEU(863-870): 2dBm – 16dBm EIRP SF Spreading Factor 7,8,…..12 Number Symbols 2^SF 128(2^7),……4096(2*12) Fig.1 LoRa Specifications (LoRa Alliance Ref.1) LoRa (Long… Continue reading LoRa Scicos Simulation_b
LoRa 915MHz Transceiver Packet Test
Introduction LoRa Parameter Region/Country Specific 900MHz ISM Freq Band North America (902-928MHz)Europe (863-870MHz) R Data Rate US(902-928): 980bps – 21900bpsEU(863-870): 250bps – 11000bps Bandwidth US(902-928): 125KHz, 500KHzEU(863-870): 125KHz, 250KHz Tx Power US(902-928): 2dBm – 28dBmEU(863-870): 2dBm – 16dBm EIRP SF Spreading Factor 7,8,…..12 Number Symbols 2^SF 128(2^7),……4096(2*12) Fig.1 LoRa Specifications (LoRa Alliance) LoRa (Long Range)… Continue reading LoRa 915MHz Transceiver Packet Test
LoRa Scicos Simulation_a
Introduction LoRa Parameter Region/Country Specific 900MHz ISM Freq Band North America (902-928MHz)Europe (863-870MHz) R Data Rate US(902-928): 980bps – 21900bpsEU(863-870): 250bps – 11000bps Bandwidth US(902-928): 125KHz, 500KHzEU(863-870): 125KHz, 250KHz Tx Power US(902-928): 2dBm – 28dBmEU(863-870): 2dBm – 16dBm EIRP SF Spreading Factor 7,8,…..12 Number Symbols 2^SF 128(2^7),……4096(2*12) Fig.1 LoRa Specifications (LoRa Alliance Ref.1) LoRa (Long… Continue reading LoRa Scicos Simulation_a
RTL-SDR for HF Marine GMDSS/DSC on SDRAngel
Introduction In previous posts I looked at decoding GMDSS/DSC HF & VHF signals using Multipsk on a Windows 10 Laptop & RaspberryPi4 (Refs.1/5). In this post I decode HF DSC signals using SDRAngel on a Windows 10 laptop. GMDSS/DSC HF Reception Parameter MF/HF VHF Frequency 2187.5, 4207.5, 6312.0, 8414.5, 12577.0, 16804.5 KHz 156.525MHz Baud Rate… Continue reading RTL-SDR for HF Marine GMDSS/DSC on SDRAngel
HF Solar Cycle 25 Band Scan
Introduction In previous posts (Ref.1/Ref.2) I looked at using WWV and the NCDXF beacons as a quick guide to assessing the existing propagation conditions. Yesterday it suddenly warmed up, so I had to get out on my newly rebuilt balcony and do a quick HF propagation test. I scanned for WWV and the NCDXF beacons… Continue reading HF Solar Cycle 25 Band Scan