Consider the following statements for baseband transmission model:

1. Channel signal-to-noise ratio is defined as the ratio of the average power of the modulated signal to the average power of noise in the message bandwidth, both measured at the receiver input.

2. Channel signa-to-noise ratio is defined as the ratio of the average power of the modulated signal to the average power of noise in the message bandwidth, both measured at the receiver output

3. Figure of merit = \(\dfrac{(SNR)_O}{(SNR)_C}\), where O stand for output and C stand for channel.

4. Figure of merit = \(\dfrac{(SNR)_C}{(SNR)_O}\), where O stands for output and C stands for channel.

Which of the above statements are correct ?

Question

Question

This question was previously asked in

ESE Electronics Prelims 2021 Official Paper

Answer 1

Signal to noise ratio(SNR) is the ratio of signal power to noise power.

Signal to noise ratio at the different points can be calculated as:

The ratio of output SNR and input SNR can be termed as Figure of Merit. It is denoted by F. It describes the performance of a device.

The Figure of merit of a receiver is

FFO