The design and implementation of the digital baseband part of a DAB transmitter prototype are introduced.It is composed of ensemble multiplexer

channel encoder and OFDM modulator.The equipment is totally compatible with ETS 300 401 and other related standards.It supports services with various data formats and supplies a convenient user interface with the ensemble multiplexer as well.All of its I/Os and the core parts are implemented using modular design based on universal internal interface

thus can be flexibly configured according to different demand.Compared with the existing products

it can provide higher flexibility and operating easiness on a much lower cost level.