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Design of a V.34 Modem for a Real-time Multitasking DSP Operating System

Thomas J. Watson IBM Research CenterFredy D. NeeserMalcolm S. Ware

出版	IBM T.J. Watson Research Center, 1995
URL	http://books.google.com.hk/books?id=nSf9GwAACAAJ&hl=&source=gbs_api

註釋Abstract: "The ITU-T V.34 Recommendation for full-duplex data/fax transmission over the public switched telephone network (PSTN) combines several state-of-the-art coding and modulation techniques to achieve data throughputs close to the theoretical limits of voiceband channels. This paper addresses the design criteria for a V.34 datapump task running on the same DSP chip concurrently with other tasks such as V.42bis data compression or voice compression. A V.34 datapump architecture suitable for asymmetric symbol rates (i.e., different transmit and receive symbol rates) is presented. Methods for improving the efficiency of modem algorithms and for reducing the peak-to-average computational load are presented."