Digital Modulation and Detection
Digital Modulation and Detection: Digital modulation means sending information as a series of binary bits (0s and 1s) over a wireless channel by converting these bits into an analog signal that can travel through the air. Detection is the process of figuring out what bits were sent by analyzing the signal received. Compared to old analog methods, digital modulation is much better because: - It uses wireless spectrum much more efficiently, so more data can be sent in the same bandwidth. - It allows strong error correction methods, making communication more reliable even when signals are weak or noisy. - It handles problems like fading and interference better. - It supports more efficient ways for multiple users to share the wireless channel. - It offers higher security since digital data is easier to encrypt. When choosing which digital modulation method to use, engineers consider these key factors: - Sending data quickly (high data rate). - Using as little bandwidth as possible (h...