Telecommunications, Navigation & Electronics

Introduction In the last few posts (Ref.1/4), I examined the WSJT-X protocols FT8 & WSPR using the RTL-SDR, HRF1 and PlutoSDR. In this post I will look at receiving FT8 using the RTL-SDR and MULTIPSK (Ref.5). MULTIPSK is an incredibly versatile Ham Radio software program that has recently added FT4rx, FT8rx & WSPR to it’s… Continue reading RTL-SDR for FT8 on MULTIPSK

Introduction In the previous three posts, I looked at WSPR & FT8 as part of the WSJT-X protocol suite (Ref.1/2/3). In the last post, I tested the feasibility of using the HRF1 as a WSPR beacon. In this post I look at the possibility of using the PlutoSDR as a WSPR beacon. PlutoSDR specs indicate… Continue reading PlutoSDR for WSPR Beacon on GNU Radio

Introduction In the previous two posts, I looked at FT8 & WSPR, as part of the WSJT-X protocol suite (Ref.1/2). Using simple antennas like a 5m wire hanging from a tree and an Alex Magnetic loop, I was able to receive signals at extremely low SNR’s. I had only experienced reception under these conditions using… Continue reading HRF1 for WSPR Beacon on GNU Radio

Introduction In the previous post I looked at receiving WSJT-X WSPR using the RTL-SDR (Ref.1). Normally I place my HF antennas outside on my balcony, but due to renovation construction this is not available to me. So I used an Alex Magnetic Loop antenna inside pointing out of the balcony window and even with this… Continue reading RTL-SDR for WSJT-X FT8

Introduction WSPR is part of a suite of communication protocols developed by Dr. Joseph Taylor K1JT, a Nobel Prize winning pulsar researcher (Ref.1). He applied the latest signal processing techniques from his astronomical research to the reception of very weak amateur radio signals. Amateur radio operators can work at signal to noise ratios bordering on… Continue reading RTL-SDR for WSJT-X WSPR