Mobile phone baseband is also called Radio. It is a circuit in a mobile phone. Its main function is to complete the demodulation, descrambling, despreading and decoding of wireless signals in the mobile network, and will eventually decode The completed digital signal is passed to the upper-layer processing system for processing. The baseband part of a mobile phone can basically use software to decode wireless signals. At the same time, software radio technology can be used to easily upgrade the baseband part to meet different needs or correct bugs in the baseband part.
#The operating environment of this tutorial: IOS 16 system, iphone13 mobile phone.
What is a mobile phone baseband?
The full English name of baseband is Baseband, which can also be translated as "information source" (information source, also called the sending terminal) without modulation ( The inherent frequency band (frequency bandwidth) of the original electrical signal for spectrum shifting and transformation is called the basic frequency band, or baseband for short.
The mobile phone baseband is also called Radio. It is a circuit in the mobile phone. Its main function is to complete the demodulation, descrambling, despreading and decoding of wireless signals in the mobile network.
Baseband transmission, when the baseband signal is directly transmitted in the channel, it is called baseband transmission. The system that performs baseband transmission is called a baseband transmission system. When a frequency band signal is transmitted directly in a channel, it is called frequency band transmission. It can be transmitted over long distances. Its disadvantages are low speed and high bit error rate.
The difference between upgrading the baseband and not upgrading the baseband is the signal translation and conversion module between the operator's base station and the mobile phone, which plays a vital role in the mobile phone. Upgrading the baseband means updating the firmware of the base station chip. Upgrading the baseband can better utilize the performance of the baseband chip and eliminate bugs. Upgrading the baseband can enable mobile phones to apply more advanced communication technologies.
The role of baseband, baseband mainly determines the signal strength of your mobile phone and affects part of the power consumption. Mobile signals in different regions are different. Refreshing the baseband means replacing the existing baseband with a new baseband, which is equivalent to the signal type of the mobile phone's modem signal that used to access the Internet via telephone lines, and the signal of the local base station signal tower. Conversion So the baseband of mobile phones in different regions is different.
Extended knowledge: The baseband version of the mobile phone
The baseband version is a circuit in the mobile phone, responsible for demodulating and demodulating wireless signals in the mobile/China Unicom/Telecom network scrambling, despreading and decoding work, and the final decoded digital signal is passed to the upper-layer processing system for processing.
Our mobile phones usually consist of two major circuits. One part is the high-level processing part, which is equivalent to the computer we use; the other part is the baseband, which is equivalent to the Modem we use. What does the mobile phone support? The network standard (GSM, CDMA, WCDMA, TD-SCDMA, etc.) is determined by it, just like the difference between ADSL Modem and ordinary narrowband Modem.
When we use mobile phones to make calls, surf the Internet, send text messages, etc., all instructions (usually standard AT instructions) are issued to the baseband part through the upper-layer processing system, and are processed and executed by the baseband part, and the baseband part completes the processing Afterwards, a logical channel will be established between the mobile phone and the wireless network. Our voice, text messages or Internet data packets are transmitted through this logical channel.
With the development of software radio technology, the baseband part of mobile phones can now basically use software to decode wireless signals. At the same time, software radio technology can be used to easily upgrade the baseband part, so as to Meet different needs or correct bugs in the baseband part.
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