When we talk about SDR, in general, we think of closed devices that are connected to the computer and, using some kind of software, proprietary or open source, can acquire and, most important, decode the radio signals. Sometimes the decoding…
The calculation of the Discrete Fourier Transform (DFT), like filtering, are by far the most common digital signal processing algorithms. When I started to investigate about the DFT, I noticed that I needed a large background before understand well how,…
When we are designing an acquisition system, sometimes process the signal is not enough, there are many cases where the project requires that the value of a measurement must be shown in a user interface. This is very easy when…
Digital signal processing involves many different operations. Although there are some algorithms with a high level of digitalization, they can be computed only with additions and shifts, others require specific hardware. For example, we need multiplicators to use an IIR…
The process to design a IIR filter is always the same. First of all we have to design the design the filter using its continuous transfer function, then, once the natural frequency of the filter, the order and the quality…
As I said in other posts, I am FPGA designer in a company. My functions are, between others, implement the signal acquisition and apply different digital signal processing algorithms, to obtain a signal that the FPGA can use to control…
In the last post we talked about digital control loops. In short, we talked about the elements that we can find in digital, or analog, control loops. The first of them is an element to acquire the difference between the…
In this blog I have tried to show you different tools, usually in the field of digital signal processing, so you can select the correct tools for your projects. This time we will use the tools that we have used…
Many times we need to manage low frequency signals sampled at high rates. This can be due to the need of detect edges in that signals as fast as possible, for example if we are using that signal to protect…
Few weeks ago Dialog Semiconductor announced a new series of FPGAs named as ForgeFPGA. The highlight of these new devices are not a high processing power, the highest speed or the big they are, the main highlights of these devices…
