SSB Demodulation
The demodulation of single-sideband (SSB) signals requires special attention, because simple mixing leads to superposition of the upper and lower sidebands at audio frequencies. The …
Advanced Software Defined Radio
The demodulation of single-sideband (SSB) signals requires special attention, because simple mixing leads to superposition of the upper and lower sidebands at audio frequencies. The …
This an excerpt of my more extensive paper on Xilinx’s Zynq System-on-Chip for Software Defined Radio processing from 2018: “The Xilinx Zynq: A Modern System …
Time delay analysis finds the delay (also called the “lag”) between two signals, that are shifted in time. It is the most important part of …
This article describes how to setup a low-cost TDOA system based on RTL-SDR + Raspberrry PI receivers and how to connect them via ethernet. Requirements …
With the advent of digital technology, analog circuits in radio transceivers have been widely replaced by digital signal processing. This is because digital signal processing …
The Panoradio offers direct sampling reception from medium wave bands to the VHF region up to 100 MHz, as well as reception of the 70 …
The analog frontend of the Panoradio prepares the analog signal from the antenna for analog-to-digital conversion. This includes filtering and amplification. The Panoradio offers three …
The AD converter is the heart of every direct sampling receiver. Its properties are crucial for the overall receiver performance. This is because once the …
SDRs typically implement “zoomable” spectrum or waterfall displays. The signal processing behind that feature is called zoom FFT. It combines a flexible digital down converter …
Digital Down Converter The audio digital down converter (DDC) follows the basic principle of the Panoradio’s waterfall DDC with the exception, that the CIC has …