In a broadcasting communication system, the transmitter power Pr is 80 KW, the channel attenuation is 80 dB (the attenuation in dB between Pr and the received signal power PRis computed as 10log10(Pr/Pr)), and the noise power spectral density is 10-11 W/Hz. The message signal has a bandwidth W = 100KHZ. 1) Find the predetection signal-to-noise ratio for the cases when the modulations are DSB-SC, DSB-LC and SSB, respectively. 2) Find the output signal-to-noise ratio (A, if the modulation is DSB. 3) Find the output signal-to-noise ratio (A, if the modulation is SSB. 4) Find the output signal-to-noise ratio ) if the modulation is DSB-LC (assume coherent detector is used in demodulation) with a modulation index 0.8 .

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Analog to Digital Converters

The analog-to-digital converter (ADC) allows circuits controlled by microprocessors, Arduinos, Raspberry Pi, and various reasonable digital circuits to be connected to the real world. In the real world, analog signals have a continuous stream of information from a variety of sources and sensors capable of measuring sound, light, temperature, or movement, in addition to the many digital systems that interact with their environment by measuring analog signals from those transducers.