| 摘要 |
<p>The invention relates to a data transmission method utilizing combined CDMA/FDMA multiple access, and a corresponding radio system. Complementary codes are used as CDMA spreading codes in the system. Transmissions on frequency channels used are synchronized with each other. To increase frequency efficiency, at least some of the frequency channels are interlaced frequencies (f0, f1, f2, f3) having a mutual frequency difference selected from the zero points of auto- and cross-correlation functions calculated as a function of the frequency offset of the CDMA spreading codes used on the frequency channels.</p> |
