baseband的意思|示意

Baseband, despite its simple definition, is a complex and important technical term used in telecommunications. It is used to describe the source of a signal before it is modulated, allowing it to be transmitted over a medium.

In telecommunications, baseband is the unmodified original form of a signal before being altered by modulation. When a signal is transmitted, it is usually modified from its baseband form to the desired characteristics (frequency, amplitude, etc.). Modulation is the process of changing the characteristics of an original signal.

Baseband signals are used in a variety of applications such as Ethernet, ISDN, telephone, television, and radio and satellite communications. These signals are further divided into two categories: narrowband and broadband. Narrowband signals have a limited range of frequencies, while broadband signals have a wider range of frequencies. Narrowband signals are usually used for voice communication and are represented by the numbers 0 and 1. Broadband signals are usually used for data transmission and are represented by the numbers 0, 1, and 2.

Baseband is also used in wired and wireless network technology. The term is used to describe the transmission of data over a single type of media, such as cable, radio frequencies, or light waves. For example, in a wired Local Area Network (LAN), baseband is used to transmit data through a single coaxial cable or twisted-pair wire. In a wireless network, baseband is used to transmit data over a radio frequency.

In summary, baseband is an important concept in telecommunications. It refers to the original form of a signal before being modulated. Baseband is used in wired and wireless networks for voice and data communication. It is further divided into narrowband and broadband, with narrowband signals typically used for voice and broadband signals used for data.