PHYSICAL LAYER Source Source Codeword;ChannelChannel Codeword eNcoder Encoder Modulator Transmitte Application Phvsical Wireless Laver Laver Source I Source Codeword ChannelChannel Codeword Decoder Demodulator Decode 一一一一一一一一一一一一一 CS5602: Principles and Techniques for Sensors and Information PerceptionCS5602: Principles and Techniques for Sensors and Information Perception 3 PHYSICAL LAYER