Digital Audio Broadcasting (DAB) technology

Author: Li Dong
Publisher:
Publish Date: 1998-07-01
Features: Broadcasting is a good teacher and friend in our lives. The AM and FM broadcasts we listen to every day transmit analog signals, which belong to analog broadcasting. Analog broadcasting has many shortcomings, determined by modulation methods and bandwidth. The main problem is that noise and distortion accumulate during transmission, and multipath propagation of radio waves causes fading, severely affecting transmission quality. Digital audio broadcasting, abbreviated as DAB (Digital Audio Broadcasting), is the new generation of broadcasting, a digital broadcasting system. This new transmission system has excellent anti-interference performance, can eliminate the accumulation of noise and distortion during transmission, and errors that occur during transmission can be corrected. Digital transmission systems require less transmission power, which is beneficial for energy conservation and reducing electromagnetic pollution, improving the environment. Digital transmission systems allow synchronous networks to operate, improving spectrum utilization. This new system is a multimedia broadcasting system that can transmit both audio broadcasting programs and data services, static and moving images, etc. This system can be received both fixed and portable, as well as mobile. In short, DAB is a new milestone in the development of broadcasting technology. DAB technology has attracted widespread attention and great interest from the scientific and technological community, broadcasting industry, and electronics industry worldwide.