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A frequency modulation (FM) receiver has a post-discriminator bandwidth of 15kHz and is designed to operate with carrier
Posted: Tue Jul 12, 2022 8:39 am
by answerhappygod
- A Frequency Modulation Fm Receiver Has A Post Discriminator Bandwidth Of 15khz And Is Designed To Operate With Carrier 1 (82.57 KiB) Viewed 39 times
A frequency modulation (FM) receiver has a post-discriminator bandwidth of 15kHz and is designed to operate with carrier deviations of up to 85kHz. Calculate the discriminator output signal-to-noise ratio (SNR) when an FM signal transmitting a 10kHz tone with a deviation of 75kHz produces a carrier-tonoise ratio of 45 dB at the discriminator input. What would be the corresponding output SNR if the amplitude of the 10kHz tone was reduced by 10 dB ? [9 Marks] It may be assumed for an FM discriminator: SNRout =2ηfo3Sc{foΔfc}2 where Δfc is the carrier deviation Sc is the average carrier power fo is the maximum baseband response η is the noise power spectral density but any other assumptions made should be clearly stated.