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The RF subsystem is located at the front end of the entire base station and is one of the key links in the normal operation of the entire nodeB system. This article mainly introduces the basic concepts and knowledge of radio frequency, so that you can have a deeper understanding of the NodeB system.
Chapter 1: Basic Concepts of Wireless Communication
Chapter 2 Introduction to Common Computing Units for RF
Chapter 3 Analysis of common concepts of radio frequency
Chapter 4 Introduction to the basic knowledge of antenna propagation
Basic overview
The communication method that uses the radiation and propagation of electromagnetic waves to transmit information through space is called wireless communication, also known as wireless communication. Wireless communication can be used to transmit telegraphs, faxes, data, images, and radio and television programs. Wireless communication refers to the long-distance transmission communication between multiple nodes without propagating through conductors or cables, and wireless communication can be carried out by radio. Wireless communications include a variety of fixed, mobile and portable applications such as two-way radios, mobile phones, personal digital assistants and wireless networks. Other examples of radio wireless communication are GPS, garage door remotes, wireless mice, etc. Wireless communication is a communication mode that uses the characteristics of electromagnetic wave signals to propagate in free space for information exchange, and the wireless communication realized in the movement is also commonly known as mobile communication, and people call the two together wireless mobile communication.
Frequency bands and bands used for wireless communication
The frequencies currently used in wireless communications range from ultra-long wavelength bands to submillimeter wave bands (including below submillimeter waves) to light waves. The frequency ranges and bands used for wireless communication are shown in the table below.