Rachel's eyes widened. "Actually, I've been struggling to model that very problem."
Most modern books say: "Below a certain SNR, FM gets worse than AM." Schwartz actually calculates it. He shows you the phasor diagram of the carrier plus noise, the "click" phenomenon, and exactly why your FM radio hisses when you go through a tunnel. Rachel's eyes widened
"I've been working on a new modulation scheme," Rachel said, her enthusiasm evident. "One that could potentially reduce noise in high-frequency transmissions." Rachel's eyes widened. "Actually
: Discussion of fiber optic systems, international data networking, and standards like SONET . the "click" phenomenon
The book typically follows a "bottom-up" approach: Signals $\rightarrow$ Systems $\rightarrow$ Modulation $\rightarrow$ Noise $\rightarrow$ Information Theory.