Basic components and basic functions - wireless data transmission module

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Basic components and basic functions - wireless data transmission module [Copy link]

What are the basic components of a wireless data transceiver? Let's take a wireless data transceiver as an example to introduce its structure. A wireless data transceiver is generally composed of a transmitter, a receiver, a phase-locked loop, a baseband processor and a modem, a CPU, and an RS-232 or RS-485 interface. The basic functions of each component are as follows: (1) Transmitter: modulates the baseband signal to the RF and amplifies the power. (2) Receiver: demodulates and amplifies the received RF signal to restore it to the baseband signal. (3) Phase-locked loop: provides a highly stable standard RF signal for the transmitter and receiver. (4) Baseband processing and modulation and demodulation: filtering, amplification, shaping, modulation and demodulation of baseband signals. (5) CPU: complete control operation, parameter setting, data processing, interface control and other functions. (6) RS-232/RS-485 interface: complete data exchange with user terminal equipment.