Base Band Unit BBU

By -

Baseband Unit (BBU)

Baseband refers to the original frequency range of a transmission signal before it is modulated. Baseband can also refer to a type of data transmission in which digital or analog data is sent over a single non-multiplexed channel.
A baseband unit (BBU) is a unit that processes baseband in telecomm systems. A typical wireless telecom station consists of the baseband processing unit and the RF processing unit (remote radio unit - RRU). The baseband unit is placed in the equipment room and connected with RRU via optical fiber. The BBU is responsible for communication through the physical interface. A BBU has the following characteristics: modular design, small size, low power consumption and can be easily deployed.
A BBU in a cellular telephone cell site is comprised of a digital signal processor to process forward voice signals for transmission to a mobile unit and to process reverse voice signals received from the mobile unit. The digital signal processor also serves to produce a first supervisory audio tone (SAT) for transmission to the mobile unit by generating successive digital SAT samples which are decoded into a continuous tone. Finally, the digital signal processor detects the presence of a second SAT generated by the mobile unit by sampling and processing successive samples of the second SAT and measuring the power.

Comments

Post a Comment

Popular posts from this blog

MRFU GRFU WRFU DRFU

By -
Image
MRFU - GSM Radio Filter Unit MRFU (GSM Radio Filter Unit) is designed based on multicarrier technology RF Filter Unit, a MRFU module maximum complete 6 carriers. MRFU module is mainly to complete the baseband and RF signal modulation signal demodulation, data processing, shunt, and other functions. › Using direct frequency conversion technology in the transmission channel, the signal is modulated to GSM emission bands amplified with filter, the duplexer filter to the antenna. › The antenna receives the radio signal, the received signal is down converted to intermediate frequency signal, and amplifying processing, analog to digital conversion, digital down converter, matched filter, AGC (Automatic Gain Control) is sent to BBU for processing. › CPRI interface clock generation, loss of CPRI interface clock recovery and alarm detection, and other functions. › Support functions of DPD/BPD predistortion. › Power control, forward power detection. ...
Read more

WMPT and WBBP

By -
Image
Huawei WMPT Wideband Main Processing &Transmission unit The BTS3900 is applicable to the indoor scenarios such as centralized installation and relocation of the macro BTS.  The BTS3900 supports –48 V DC power input and the modules. The modules of the BBU3900 and CRFU are installed in a centralized way in an indoor cabinet. The WMPT card Installed in BBU at slot 7 for the services of NodeB mean UMTS or 3G It receive data from RTN Transmission Rack  As the most compact indoor macro BTS in the industry, the BTS3900 features a large capacity, good extensibility, light weight, and a small size.  In addition, the BTS3900...
Read more

GTMU Card of BBU

By -
Huawei, CDMA, BTS3900, GTMU, Base Station, Telecom Board For GSM Transmission, Management Unit Description: GTMU is the GSM Transmission & Management Unit for BBU in Huawei BTS3900.   Applications: GTMU is the GSM Transmission & Management Unit for BBU in Huawei BTS3900. BTS3900, the indoor macro base station, is applicable to the indoor centralized installation scenario . The BTS3900 cabinet houses the BBU3900 and the RF module. In addition, the BTS3900 cabinet provides the functions such as power distribution and surge protection. A BTS3900 cabinet accommodates a maximum of six RF modules, thus meeting the requirements for indoor centralized installation and fast network construction, saving installation space, and facilitating smooth evolution. The BTS3900, as one of the most compact indoor macro base stations in the industry, features large and scalable capacity. It has a small footprint and supports the multi-mode application.   BTS3900 Configuration...
Read more