| 摘要 |
PURPOSE:To compress the scale of a matching filter, by providing a device converting a complex signal to a phase angle, an adding device for the phase angle, and a device converting the phase angle to the complex signal, in the matching filter of a receiver. CONSTITUTION:An inputted complex series is converted to the phase angle. To perform conversion, it is possible to use, for example, a numeric table (memory device) to give gamma=arctan(Y/X) to X+(-1<1/2>)Y. However, correction to add (pis) on arctan(Y/X), etc., is performed according to the positive or negative polarity of the X or Y. Assuming the conversion of (a complex number the phase angle) as T, and the conversion of (the phase angle the complex number) as T<-1>, the matching filter of a spectrum diffusion communication equipment is exressed as in figure. Where, marks represented in 5 and 20 are adders of integer setting 25 as a modulus. In this way, it is possible to remarkably simplify the constitution of the matching filter of the receiver having a spectrum diffusion communication system. |
