mottakerdemodulator

A mottakerdemodulator is the demodulation stage in a radio receiver responsible for extracting the original information signal from a modulated carrier. In Norwegian-language usage the term reflects the function within the receiver, and in English contexts the component is usually called the demodulator or the receiver demodulator. Its primary purpose is to recover audio, data, or other baseband information while rejecting the carrier and as much noise as possible.

In a typical receiver, the demodulator follows the RF front end and any intermediate frequency processing. After downconverting the received signal to baseband or an IF, the demodulator converts the modulated form back into the information signal. The design and method depend on the modulation scheme and can be implemented with analog circuitry, digital signal processing, or a combination of both.

Types of mottakerdemodulators include:

- Analog demodulators: for amplitude modulation, an envelope detector or diode detector recovers the audio; for frequency modulation, a discriminator or phase-locked loop-based detector retrieves the modulating signal; for single-sideband or double-sideband with carrier, product detectors or phase-sensitive demodulators may be used.

- Digital demodulators: in software-defined radios or digital receivers, coherent demodulation handles QAM, PSK, or other digital modulations, often with timing recovery and error correction performed in software or firmware.

Key considerations for a mottakerdemodulator are noise performance, linearity, carrier recovery, synchronization, and susceptibility to interference. The choice of demodulation strategy affects fidelity, bandwidth efficiency, and system complexity.