| 摘要 |
PROBLEM TO BE SOLVED: To prevent a reception pseudo noise code from being leaked into a data component due to physical leakage of a multiplier for inverse spread processing. SOLUTION: A clock signal from a voltage controlled clock oscillator 21 for code generation is multiplied with a pseudo noise code outputted from a reception pseudo noise code generator 22 to color the pseudo noise code. Since the colored pseudo noise code has a smaller low frequency energy component, the energy of the pseudo noise code leaked in the occupied band of an information signal is reduced resulting that a bit error rate is reduced even when an inverse spread processing multiplier 23 has leakage. |
