| Pseudo-random code phase modulation system is studied in this paper Thecharacteristic and generation of pseudo-random code,signal modulation and demodulation,correlation cetection is discussed in detail.The program of generating the M sequence onbasis of programmable digital instruments is made with the verlog language, modulator,demodulator and correlative circuit is simulated and designed with mixers as the coreinstrument. The circuit is simplized with mixers modulation. The test result meets therequests of the system. The project of the measurement of the variable delay is discussedat last. |
PDF Full Text Request