DIGITAL RADIO RECEIVER Russian patent published in 2008 - IPC H04L27/22 

FIELD: physics, radio.

SUBSTANCE: digital radio receiver includes pre-selector, adder, analog-to-digital converter, noise generator, unit of transit to intermediate frequency, basic selection filter, demodulator, and additional amplifier with variable amplification factor, input connected to pre-selector output and output connected to first adder input. Guiding input of amplifier with variable amplification factor is connected to amplification control unit output, second adder input is connected to noise generator output. Noise generator includes pseudo-random sequence generator and low frequency filter connected in series, and adder output is connected to analog-to-digital converter input, output of which is connected simultaneously to amplification control unit input and first input of linearisation unit, second input of which is connected to amplification control unit output. Linearisation unit output is connected to band shift unit input, output of which is connected to input of basic selection filter unit, output of which is connected to input of signal envelope fixation unit with its output connected to demodulator unit input, and demodulator output serves as output of the device.

EFFECT: extended frequency and dynamic range of received signals and reduced non-linearity of receiving path.

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