| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the required memory area for enhancing the efficiency usage of the memory area, by not calculating all the correlation values for 16 signature codes, but calculating the correlation value for one signature code and obtaining correlation values for 16 signature codes on the basis of the calculation result, in preamble detection. <P>SOLUTION: A preamble signal is received, and the received preamble signal is multiplied by a plurality of signature codes, and a plurality of multiplication results are added at specific intervals, and a plurality of addition results are added, in accordance with a signature code pattern to obtain correlations among the preamble signal and signature codes. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
