As demodulation manner of the poly position frequency manipulate signals due to regular interval frequency diffusion, you read with the demodulator, and the computer for the said signal and you designate

摘要

This invention is something regarding signal transmission engineering. Recovery threshold is decreased with the progressive recovery method of the multi position frequency manipulate signals due to regular interval frequency spread, it becomes possible to improve recovery quality. This at least is identical with the quasi- optimum demodulator. The maximum due to the absolute value of the reception signal where in order to obtain that kind of result, it forms the frequency grid which it can make frequency spread align accurately, in when receiving, it is possible, in all frequencies to change to clock frequency, is acquired. This clock frequency is acquired from maximum of the aforementioned reception signal, is used for the accurate alignment of the aforementioned frequency spread. The adjustment possible frequency grid is aligned the frequency spread which adjusted to the accurate value of frequency of the reception signal accurately. And, as for this recovery, you can obtain the effect by in-phase receiving the aforementioned reception signal. The in-phase reception in order to decide the presence of the signal of specific frequency from midst of accurate value of the aforementioned frequency, is done by using only one orthogonal channel among the orthogonal channels which is 2 or more.