Binary Digital Modulation Signals

In this article, we explore binary digital modulation signals and their primary variants: OOK (On-Off Keying), 2PSK (Binary Phase Shift Keying), and 2FSK (Binary Frequency Shift Keying). Through spectral analysis of these signals, we gain deeper insights into their characteristics and practical applications. Notably, transmission modes and modulation schemes significantly influence spectral behavior, which we examine in detail. From an implementation perspective, OOK can be simulated by multiplying the carrier with a binary sequence using element-wise operations, while 2PSK typically employs phase inversion (0° and 180°) achievable through trigonometric functions or complex exponentials. 2FSK implementation often involves switching between two oscillators or frequency synthesizers controlled by binary data. We conclude by discussing the trade-offs between bandwidth efficiency, power consumption, and noise immunity for each modulation type, along with future advancements in digital communication systems.