Question: A certain communication channel is characterized by 9 0 - d B attenuation and additive white noise with power - spectral density of N 0

A certain communication channel is characterized by 90-dB attenuation and additive white noise with power-spectral density of N02=0.510-14WHz. The bandwidth of the message signal is 1.5 MHz and its amplitude is uniformly distributed in the interval -1,1. If we require that the SNR after demodulation be 30 dB , in each of the following cases find the necessary transmitter power.
USSB modulation.
Conventional AM with a modulation index of 0.5.
DSB-SC modulation.
A certain communication channel is characterized

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