HEILBRONN, Germany--Atmel Corp. today announced a single-chip baseband processor for Digital Audio Broadcasting (DAB) radios. The European unit of Atmel here said the new IC U2739M processor is the industry's first one-chip decoder, featuring full decoding rate capability.
The baseband processor contains both the channel and source decoder on chip, said Atmel, which added that the device is the only single-chip solution capable of performing decoding rates of 1.82 megabits per second. This performance will enable a car radio to receive audio data as well as other DAB services, such as messages, "electronic newspapers," and videotext information, according to Atmel.
The DAB processor's channel decoder handles orthogonal frequency division multiplexing (OFDM) demodulation/decoding and time/frequency synchronization algorithms. An Oak digital signal processor (DSP) core is used to perform these channel functions. The source decoder block consists of an audio decoder (supporting ISO MPEG 1,2 layer 2) and a data decoder. This architecture provides two independent packet mode decoders, said Atmel.
The processor, fabricated in advanced CMOS, is being offered as part of a three-chip set for DAB system solutions. Atmel said its chip set covers all analog and digital functions of a DAB receiver.
Samples of the U2739M processor are available now, priced at $24 each in 100,000-piece quantities. An evaluation board is also being offered by the San Jose-based company. The kit consists of a radio-frequency (RF) frontend board, an interface board with microcontroller and A/D converter, and baseband evaluation board.