Very efficient frequency usage system using convolutional spreadtime signals based on complete complementary code

摘要

We have proposed a method for increasing the informationtransmission rate and the frequency usage rate based on a new method forestimating multipath channels and spread time signals convolution. Weused a pilot signal and data-transmission signals in the same frequencyand in the same time. For this purpose, we used the completecomplementary code on approximately synchronized systems. Theinformation transmission rate came to (1.3/k) chip/bit, where k was theQAM factor. In this paper, a new usage method for a complementary codeis proposed. The new method is far simpler than the old method. Byapplying the proposed usage method for a complete complementary code onthe above high rate information transmission method, the high rateinformation transmission can be realized easier