| 摘要 |
PROBLEM TO BE SOLVED: To provide a spread spectrum communication method which eliminates interference between channels without superposing a direct current on a spread code while using a troublesome DC superposing circuit. SOLUTION: Signals Sg1 to Sgi are applied to gates G1 to Gi. The gates G1 to Gi allow the signals Sg1 to Sgi to pass according to a normal modulation code applied from a modulation code generator 18. The signals from the gates G1 to Gi are added by an adding circuit 10 and applied to a multiplying circuit 12. A signal received through an antenna 31, on the other hand, is inputted to a 3rd multiplying circuit 48 through a 2nd multiplying circuit 41. The 3rd multiplying circuit 48 multiplies signals inputted in unbiased normal modulation code from a modulation code generator 26. The signal from the 3rd multiplying circuit 48 is integrated by an integrator 50 and demodulated into source signals Sg1 to Sgi. |
