| 摘要 |
PURPOSE:To obtain an excellent reception signal even at crosstalk of interference wave onto a power level by applying correction calculation to a spread spectrum signal based on a correction value corresponding to a power spectrum of the signal and then making comparison and discrimination based on a corrected output level of each channel. CONSTITUTION:A reception signal (input signal) being the mixture of a disturbing wave to a spread spectrum signal is inputted to a narrow band filter group 11 with a different center frequency. Each filter output is divided into two systems, the one is given to a filter selection circuit (MPX) 12, which selects either filter output and it is inputted to a detection circuit 13. A signal from the detection circuit 13 is given through an integration circuit 14 to a comparison discrimination circuit 15, in which output energy of each filter is compared and discriminated. The power spectrum of the spread spectrum signal is not required to be considered by normalizing the energy based on the energy passing through a filter whose center frequency is close to the frequency of the spectrum, that is, the comparison and discrimination aiming at only an interference wave is attained. |
