#Elektor sdr receiver install#
#Elektor sdr receiver software#
#Elektor sdr receiver plus#

The audio quality is superb at 234ksps and still acceptable (but no longer HiFi due to narrow-bandwidth-related distortion) at 96ksps sample rate.

demodulation of wide FM broadcast signals: possible at 234ksps sample rate in order to pass through the WFM signal, which has 180kHz bandwidth for MONO and 246kHz for STEREO.

dynamic frequency indicator figures and graticules on spectrum display x-axis.

supports many different sample rates up to 281ksps.

automatic IQ amplitude and phase imbalance correction: this corrects imbalances that are caused by the hardware and results in > 55dBc mirror rejection.

also plays MP3 and M4A files from the SD card in best HiFi stereo quality (with the excellent lib by Frank BГ¶sing).

superb audio quality (of course not like FM quality, but very good compared to other commercially available shortwave receivers).

This allows to differentiate between different carrier frequencies which is helpful in identifying AM medium wave stations (which pretend to transmit on the same frequency, but in fact have differing frequencies, sometimes several Hz, sometimes only several milli-Hz).

Zoom into the spectrum for greater frequency resolution detail (up to 2048x = 0.2Hz resolution per pixel): uses a Zoom FFT approach (Lyons 2011).

sophisticated automatic gain control (AGC) adapted from the wdsp lib by Warren Pratt.

display up to 192kHz (281kHz experimental) of frequency spectrum.

demodulation of AM (nine different algorithms implemented), SAM (real synchronous AM !) with user-selected sidebands and Stereo-SAM, LSB, USB, pseudo-Stereo-USB, pseuso-Stereo-LSB (more to come.

filter coefficients are calculated by the Teensy itself and the filter bandwidth can be chosen arbitrarily by the user in 100Hz-steps (100Hz to 11kHz audio bandwidth).

filtering with 257 tap FIR filter (equivalent to 2056 tap filtering because of decimation-by-8) -> comparably steep filters are normally available in commercial receivers from 2000$ upwards -).

FFT and inverse FFT with 512 points using the new CMSIS DSP lib complex FFT function.

#Elektor sdr receiver plus#

reception from about 12kHz to 30Mhz plus undersampling 3x mode for wideband FM receive.Teensy 3.6 with audio board working in floating point.download Teensy_Convolution_SDR.ino from this github page and compile it.

#Elektor sdr receiver install#

Install a newer version of the ARM CMSIS DSP library and set it to use floating point (explained HERE: (Software-Defined-Radio)?p=129081&viewfull=1#post129081.Unzip and copy the following libraries into your Arduino folder (/Program Files/Arduino/hardware/teensy/avr/libraries):.antenna for longwave/mediumwave/shortwave.eight pushbuttons (three of them could be encoder pushbuttons).QSD = quadrature sampling detector and a local oscillator that can be tuned by I2C (eg.

#Elektor sdr receiver software#

Teensy Convolution SDR software running on the hardware designed by Dante DO7JBH Reception of longwave, medium wave and shortwave signals from about 12kHz to 30Mhz, additionally undersampling reception of FM broadcast signals 88 - 108MHz in HiFi quality and STEREO This radio uses the Fast convolution approach to filter and process the radio signals with the floating point microprocessor Teensy 3.6 Software Defined Radio with the Teensy 3.6, the Teensy Audio board and any IQ-Quadrature Sampling Detector