| 摘要 |
PURPOSE: To provide a correlation device with the circuit constitution of a small scale even when a multiplex number is large by preparing a spreading code channel dedicated to synchronization and providing a synchronization circuit for performing code phase synchronization and clock synchronization only in this channel. CONSTITUTION: The spreading code generator 103 of a transmission part generates code sequences PN1 -PNK for data and the code sequence PN0 for the synchronization, an adder 104 adds the code sequences for the data outputted from a parallel combination mapping part 102 and the code sequence PN0 directly inputted from the spreading code generator 103 and a high voltage stage 105 converts the output of the adder 104 into a prescribed frequency and sends it out. The carrier recovery circuit 205 of a reception part inversely spreads reception signals by the code sequence PN0 for the synchronization and recovers carrier waves and a base band demodulation circuit 206 generates base band signals based on the reproduction carrier waves and judges the data. By the constitution, digital processings are used often for the demodulation of the reception signals and a circuit scale is reduced. |
