专利汇可以提供Receiver for digital multi-frequency signal专利检索,专利查询,专利分析的服务。并且PURPOSE: To simplify the circuit constitution of a receiver which uses a discrete Fourier transforming method by making the circuit into costitution for eight-wave processing and by attaining the multiplication of a window function and square-law multiplication for power making use of a free time for two waves at the time of the matching of a clock speed with a time-division switchboard.
CONSTITUTION: Thr receiver which receives and processes a multi-frequency signal after pulse-code modulation using a discrete Fourier transforming method is equipped with two arithmetic units which have multipliers 6 and 7, adders 8 and 9, delay memories 10 and 11, absolute-value circuits 12 and 13 as integrating circuits respectively. Further, one common read-only memory ROM 22 for both arithmetic units is provided, and both groups are equipped with shift registers 23 and 24 of 16-bit word length. Then, a window function read out from ROM 22 by the multiple use of memories 10 and 11 is multiplied by input data and its result is held temporarily and squared; and sine and consine values read out from ROM 22 are multiplied by corresponding multiplication results, and logic circuit 15 finds the absolute- value or square-law sum via circuit 12 or 13.
COPYRIGHT: (C)1979,JPO&Japio,下面是Receiver for digital multi-frequency signal专利的具体信息内容。
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