| 摘要 |
<p>A noise code string generator comprising a plurality of memories where a plurality of kinds of noise code strings not correlated with one another are stored. A noise code string read-out section reads out the noise code strings stored in the memories in such a way that the code periods thereof are relatively prime. A code string adding section adds the noise code strings read out parallel from the memories by the noise code string read-out section and outputs the addition results as a series of noise code strings. In a CN controller, a setting section sets a value determining the amplitude of a digital modulation signal string in a register. A multiplying section multiplies the inputted digital modulation signal string by the value set in the register. A CN adding section outputs the sum of the series of noise code strings outputted from the code string adding section of the noise code string generator and the output from the multiplying section.</p> |
