专利汇可以提供Digital multi-frequency receiver专利检索,专利查询,专利分析的服务。并且PURPOSE:To obtain a multi-frequency receiver which can reduce the multiplying frequency down to half and double the multiple degree of the receiver by providing the memory at the front step of the receiver. CONSTITUTION:Two-system input signal of 1 and 2 of 80 units which are sampled during the least common multiple 10m sec. of the cycle of the multi-frequency signal frequency are turned to the signals which are delayed by 40 samples through delay memory 9 and 10. Subtractor 13 and 14 deliver the differene between the signal before 40 samples and the current sample to selector 11. Selector 11 applies the subtraction output alternately and every 5m sec. to discrete Fourier converter 12 via signal 7, and converter 12 delivers MF reception signals X7-X17 to individual input signal 1 and 2 every 5m sec. As a result, converter 12 can process the MF signal twice as many as conventional.,下面是Digital multi-frequency receiver专利的具体信息内容。
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