Category: Electronics

Introduction In the previous post I received an OLIVIA 64-2000 transmission as part of a ShortWave Radiogram broadcast (Ref.1). I know from my work with MFSK how robust this mode is, so I thought it would be interesting to see how the OLIVIA 64-2000 compares to MFSK64 using the same channel model I used to… Continue reading HF OLIVIA 64-2000 Channel on GNURadio

Introduction During the past several years I have received broadcasts from Short Wave Radiogram using the RTL-SDR and SDR-IQ receivers. These broadcasts featured transmissions using MFSK32/64 which I decoded with FLDIGI and Multipsk (Ref.1/3). These broadcasts illustrated the amazing noise performance of MFSK. Last week Short Wave Radiogram added a segment using OLIVIA 64-2000 (Ref.4).… Continue reading HF SDR-IQ for Olivia 64-2000

Introduction This past year I was able to successfully receive CubeSats ENSO, Veronika and EIRSAT-1 (Ref.1/3). All three CubeSats have since decayed from orbit according to the SatNOGS database. Doing a search, I found a recent CubeSat launch CANVAS (Ref.4). So I thought I would try reception using my 2m/70cm yagi. I previously used an… Continue reading CubeSat CANVAS on GNURadio

Introduction In the previous post I was able to receive MSK144 meteor scatter transmissions on 6m using the RTL-SDR (Ref.1). I thought it would be worthwhile to see how robust this protocol is using a simple GNURadio channel model. In the QEX design paper the following performance figures are given (Ref.2):SNR>0dB, almost all frames decoded… Continue reading Meteor Scatter MSK144 Channel on GNURadio