PRRU refers to pico base station equipment, which is an active device. It is a small, low-power, low-power indoor coverage radio frequency unit, that is, an indoor base station. The PRRU has the functions of a receiver and a transmitter, that is, it converts the digital signal (first converted into an intermediate frequency signal) into a radio frequency signal at the remote end, and then amplifies and transmits it; or it receives the radio frequency signal received by the antenna and converts it into a digital signal. and then passed to the baseband processing unit.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

PRRU is a pico base station equipment, which is an active device. PRRU is a small, low-power, low-power indoor coverage radio frequency unit, that is, an indoor base station.

• Active devices

  Active devices refer to devices that require power to achieve their specific functions. Passive devices refer to devices that can display without the need for external power. its characteristics.

• Pico base station equipment

  Pico base station is a small, low-power, low-power indoor coverage radio frequency unit, that is, an indoor base station.

Introduction to PRRU

The full name of PRRU is picorru, and the pico base station is a kind of micro base station. For smaller base stations, in order to reflect the level difference, the word pico is used. According to the rules of the 3GPP organization, wireless base stations are divided into four categories, namely macro base stations, micro base stations, pico base stations and femto base stations. These four types of base stations, to put it bluntly, are divided according to power. The macro base station has the largest power and the largest coverage area. The flying base station has the smallest power and naturally the smallest coverage.

Function of PRRU

The functions it performs are basically the same as the traditional RRU used for macro coverage. It has the functions of a receiver and a transmitter, that is, both At the remote end, the digital signal (first converted into an intermediate frequency signal) is converted into a radio frequency signal, and then amplified and transmitted; or the radio frequency signal received by the receiving antenna is converted into a digital signal and then transmitted to the baseband processing unit (bbu).

PRRU’s product series

Pico base station is the collective name for a type of base station. Each equipment manufacturer has its own series of pico base stations and its own naming method. Pico base stations from different manufacturers also vary greatly in form. For example, Huawei's is called Lampsite, ZTE's is called Qcell, Nokia's is called Flexi Cluster, and Ericsson's is called RDS.

Types of PRRU

Pico base stations are divided into integrated pico base stations and extended pico base stations, as well as single carrier frequency and dual carrier frequency. Extended pico base stations, also called distributed pico base stations, usually consist of a baseband unit (BBU), a hub unit (RHUB), and a remote radio unit (pRRU).

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Classification of active devices

• Electron tube

  Electron tube is also called vacuum tube, so it is also called electric vacuum device. Whether the electron tube is diode or multi-pole, it has an anode and a cathode, and the cathode is added Under the action of the power supply, the emitted electrons flow to the anode. The external power supply can be directly added to the cathode, or it can be added to another heating filament. Because of the existence of this external power supply, they are collectively called active devices.

• Transistor

  Belongs to semiconductor devices. Substances with electrical conductivity between conductors and insulators are called semiconductors. For example, silicon and germanium crystals are all semiconductors, so use these Electronic devices made of crystal materials are called transistors, which are divided into crystal diodes and crystal transistors.

• Integrated circuit

  Circuit, as the name suggests, is a concentrated manufacturing of active devices, passive devices and connecting lines on a very small silicon wafer, and then through the leads and Packaging, forming a miniature whole with predetermined functions. The advantages of integrated circuits are small size, long life, low cost, reliability and high performance. Currently, integrated circuits and large-scale integrated circuits are increasingly widely used.

The role of active equipment

The role of active equipment is to rely on power as the basic working condition to complete its normal work. Active devices, which are mainly front-end equipment, amplifiers in transmission networks, overcurrent branch distributors, feed amplifiers, optical transmitters, receivers, etc., and amplifiers are the most commonly used and widely used active devices in access networks. , its function is that after the TV signal is transmitted from the cable for a certain distance, due to the transmission attenuation characteristics of the cable, the TV signal becomes lower and lower. When it reaches the specified level, an amplifier must be added to amplify the signal and then It is transmitted downwards to amplify the signal and transmit TV signals to long distances.

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