| 摘要 |
PURPOSE:To secure the communication with a desired station even when plural equipment are in use simultaneously by connecting a demodulation means to a detection means detecting a confirmation result coincident from plural confirmation means. CONSTITUTION:Upon the receipt of a signal of an ID code different from a spread code 102, a correlation device 101 applies inverse spread processing to the code 102 to provide an output of it as a correlation output signal in which a correlation peak is deviated by a time (t). It is given to a timing generator 103, from which timing signals t1, t2 with a PN period deviated by the time (t) are generated and either of them is outputted to detection circuits 104, 105. The circuits 104, 105 output a correlation signal being an output of the correlation device 101 to confirmation circuits 107,108 and a switching circuit 109 based on the signals t1, t2. Whether or not they are coincident with an ID code 106 is confirmed and the result is outputted to a control circuit 110. Then the circuit 109 is selected so that an output of the detection circuit corresponding to the coincident confirmation circuit is fed to a demodulator 111. Thus, the transmission signal with the same spread code and the same ID code as the reception signal is sent. |
