| 摘要 |
PURPOSE:To measure numerous positions with less radio wave channels, by using a spectrum diffusion radio wave. CONSTITUTION:A spectrum diffusion radio wave diffused by a diffusion code from a diffusion code generator 2 of a main station M is transmitted through a transmitter 1, antenna 4, etc., and received by an antenna 5, receiver 7, etc., of a secondary station S and the diffusion code is reproduced. The diffusion code is impressed upon a transmitter 8 and the spectrum diffusion radio wave crresponding to the diffusion code is transmitted through the antenna 5. The spectrum diffusion radio wave is received by a receiver 9 of the main station M. The diffusion code from the generator 2 through a delay circuit 10 is also inpressed upon the receiver 9 and the diffusion code reproduced at the receiver 9 is subjected to tracking. Delay in time corresponding to a distance is determined through the circuit 10 and displayed on a display 11. By a system using the spectrum diffusion radio wave of the diffusion code having a frequency which is different from an approximate carrier wave, occurrence of interference between each signal is prevented and measurement of numerous positions can be performed with less radio wave channels. |
