DSP的发展 毕业论文外文翻译.doc

英文文献 DSPs Back to the Future[13] W. Patrick Hays Published online： 23 June 200Springer Science + Business Media B.V. 2004 Abstract Our complex world is characterized by representation, transmission, and storage of information-and information is mostly processed in digital form. With the advent of DSPs (digital signal processors), engineers are able to implement complex algorithms with relative ease. Today we find DSPs all around us-in cars, digital cameras, MP3 and DVD players, modems, and so forth. Their widespread use and deployment in complex systems has triggered a revolution in DSP architectures, which in turn has enabled engineers to implement algorithms of ever-increasing complexity. A DSP programmer today must be proficient in not only digital signal processing but also computer architecture and software engineering. Keywords　 DSP；Motor control systemThe Intel 2920 included on-chip (D/A) digital/analog and A/D (analog/digital) converters but lacked a hardware multiplier and soon faded from the market.An NEC project resulted in the NEC μPD7720—one of the most successful DSPs of all time.The Bell Labs DSP-1 and NEC μPD7720 were announced at ISSCC80.DSP-1,achieved 5-MHz clock speed，executing 1.25-MB multiply-accumulates per second at four clock cycles each—enough to allow Touch-Tone receiver filters to execute in realtime.The once formidable performance demands of the Touch-Tone receiver are now ludicrously easy, but new applications in turn arose throughout the last 20 years to put new demands on DSP technology (see figure 1).According to Will Strauss,president and principal analyst at Forward Concepts, “DSP shipments were up a healthy 24 percent in 2003, and we are forecasting a bit higher growth for 2004, at 25 percent. Longer term,we forecast a 22.6 percent compound growth rate through 2007.”So the game has been: Boost DSP performance, run the algorithm atan acceptable cost, and open up a new commercial market.It is perhaps too glib to project this t