专利名称：Digital data over voice communication发明人：Dev V. Gupta申请号：US07/345472申请日：19890428公开号：US05025443A公开日：19910618
摘要：A method and apparatus is described for transmitting and receiving data signalsand voice band signals over a single pair of wires, wherein the energy content of the datasignals in the voice band is transferred to a higher frequency to avoid interferencebetween the two. This is accomplished by sinusoidally encoding the data pulses in thefrequency domain. The encoding is equivalently performed in the time domain by linearlycombining weighted delayed and advanced versions of the data pulses, in accordancewith a weighting formula. A transversal filter is used to multiple delayed and advancedversions of the data pulses by a scaling factor times the ratio of m!/m-i)!i! factorialwherein i is the ith version being weighted, m is an integer greater than one and !indicates the factorial function.
申请人：INTEGRATED NETWORK CORPORATION
代理机构：Hamilton, Brook, Smith & Reynolds
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