| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a code spreading method suitable for a transmission system for assigning spread signals to a low-relative position of a propagation path. <P>SOLUTION: In transmitting information bits from a transmitter 1 to a receiver 3, first, the modulator 11 of the transmitter 1 inputs the information bits to generate modulation symbols. A spreader 12 spreads the obtained modulation symbols, and spread signals are assigned to the low-relative position of the propagation path by a symbol interleaver 13 and transmitted to a propagation path 2. The receiver 3 performs a reverse operation to that of the transmitter to decode the information bits. In this case, the spreader 12 uses rotational orthogonal code to spread adjacent spread signals with a rotational orthogonal code having a different rotation angle. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
