What is RTL-SDR dongle?

RTL-SDR is a very cheap ~$25 USB dongle that can be used as a computer based radio scanner for receiving live radio signals in your area (no internet required). The RTL-SDR is also sometimes referred to as RTL2832U, DVB-T SDR, DVB-T dongle, RTL dongle, or the “cheap software defined radio”.

What is RTL-SDR TCP?

What is RTL-SDR. The RTL-SDR is an ultra cheap software defined radio based on DVB-T TV tuners with RTL2832U chips.

What does RTL stand for in RTL SDR?

RTL is short for RTL2832U. The Realtek RTL2832U chipset was a popular choice for digital video broadcast (DVB-T) receivers, whose original purpose was to receive video. It was discovered that these could be hacked and turned into wideband SDR receivers. These devices have come to be known as the RTL-SDR.

What is direct sampling SDR?

In the ultimate software-defined radio (SDR), the input from the antenna is connected directly to the analog-to-digital converter (ADC). All the filtering, demodulation, and other processing then are done in DSP. Such radios already exist for the lower frequencies.

What is Airspy?

Airspy is a line of Popular Software-Defined Radio (SDR) receivers developed to achieve High Performance and Affordable Price using innovative combinations of DSP and RF techniques.

How does SDR radio work?

In a software-defined radio (SDR), some of the radio functions typically implemented in hardware are converted into software [69]. Typically, an SDR receiver uses an ADC to change the analog signals from the antenna into digital signals that are processed using software on a general-purpose processor.

How does rtl-sdr dongle work with GNU Radio?

GNU Radio Companion (GRC) is a block-based software design platform that makes it easy to work with radio systems by using only a block-like interface. RTL-SDR dongle provides raw data to GNU Radio. All signal processing is performed using reconfigurable software.

Which is the best software for rtl-sdr?

It is available on AUR as sdrsharp-svn. The most capable software for RTL-SDR is GNU Radio and its graphical tool: GNU Radio Companion. It is also available on AUR (name: gnuradio). It is also required to install package gr-osmosdr-git from AUR that is needed to use RTL-SDR dongle as source in GRC.

How to add rtl-sdr source in GRC?

Add RTL-SDR source from the tool library in GNU Radio Companion (GRC). It is available on the right side of the window. Then, change the parameters of the block by double clicking it as shown in Table I. This block when added to the design provides signal changes and makes it suitable to provide as input to further blocks.

How to remove images from rtl-sdr v.3.dongles?

To remove these images you need to use a low pass filter for 0 – 14.4 MHz, and a high pass filter for 14.4 – 28.8 MHz, or simply filter your band of interest. (Note that that 28.8 MHz is downsampled on chip resulting in the 3.2 MHz bandwidth)