Question

AM demodulation technique can be divided into _____ and _____ demodulation.

(a) Direct, indirect

(b) Slope detector, zero crossing

(c) Coherent, noncoherent

(d) Quadrature detection, coherent detection

I got this question in examination.

I need to ask this question from Amplitude Modulation in section Modulation Techniques for Mobile Radio of Wireless/Mobile

Answer 1

Right option is (c) Coherent, noncoherent

For explanation I would say: AM demodulation techniques may be broadly divide into two main categories. They are called coherent and noncoherent demodulation. They are differentiated by the knowledge of transmitted carrier frequency and phase at the receiver.