| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a spread spectrum communication equipment which can easily synchronize reception signals by transmitting a pilot channel whose polarity is always '1' and which is spread by a spreading code system except for a spreading code for data transmission from a transmission-side and executing synchronization on a reception-side. SOLUTION: In the transmission-side, a spreading code mapping circuit 2 and a spreading code generation circuit 3 convert transmission data 1 into the spreading code, the code is added with the pilot channel generated in a pilot channel generation circuit 4 by an adder 5, and the code is converted into a transmission signal by a modulator 6 so as to be transmitted by a transmission antenna 7. In the reception-side, the transmission signal is received by a reception antenna 8, is converted into a base band signal by a demodulator 9 and it is inputted to a synchronization circuit 10 and a correlation unit 11. The synchronization circuit 10 synchronizes the spreading code by detecting correlation with the spreading code used for the pilot channel. Thus, the spread spectrum communication equipment which can easily synchronize the reception signal can be obtained.</p> |
