| 摘要 |
PURPOSE:To make possible miniaturization and to reduce cost by performing spreading and transmission by two respectively different pseudo noise signals for binary information data, performing inverse spreading by one of the pseudo noise signals on a reception side and judging the presence of correlation detection output. CONSTITUTION:A transmission side is provided with pseudo noise signal generation parts 2A and 2B for generating the two pseudo noise signals A and B and a selector 3 for selecting the signals A and B spread by inputted information data. Without changing the polarity of the spreading pseudo noise signals by the information data, one of the two respectively different signals A and B of the binary information data '1' and '0' is allocated, spread and transmitted from an antenna 4. On the reception side, the inverse spreading is performed by multiplying a reception side pseudo noise signal A same as the transmission side outputted from the generation part 2A and reception signals received by the antenna 5 at an inverse spreading part 6. Thus, the information data can be reproduced just by the presence of the correlation detection output from the inverse spreading part 6. |
