What does baseband mean?

The baseband of mobile phone is equivalent to a circuit in mobile phone, which is responsible for demodulation, descrambling and despreading of wireless signals in mobile network. Baseband is commonly known as BB, which can be understood as communication module. The unmodulated original electrical signal sent by baseband signal source has low frequency characteristics, and the signal spectrum starts from near zero frequency and has low-pass form. According to the characteristics of the original electrical signal, the baseband signal can be divided into digital baseband signal and analog slave baseband signal, which is determined by the signal source. Making phone calls, surfing the Internet, sending short messages and other operations are all done through baseband processing; Baseband establishes a channel between mobile phone and wireless network, and transmits voice, short message and Internet data through this channel; Baseband is a tool for decoding digital signals of mobile phones, which can be simply understood as being responsible for signal network; At present, the manufacturer with the strongest baseband is Qualcomm, and Qualcomm has the most complete baseband support network system with excellent performance.