Does Qualcomm CDMA patent fee have a fixed number of years?

Not forever, but within the validity period of his patent, it will be made public after the validity period. This is also to encourage innovation.

However, there are many patents for CDMA design, some of which may be invalid and some of which are still valid. In addition, he is still applying for patents. Unless you can avoid patents, you can't avoid his pre-designed patent network. After all, he set the standard.