What is new in this O-CDMA Technology? (Short abstract of patent)

The lower the cross-correlation values of the spreading codes of different user signals are, the fewer the interferences and the more users that are able to participate in orthogonal Code Division Multiple Access, especially in asynchronous mode. A receiver that is set to use one particular code can only be reached by the transmitter sending the same code. In order to attain an optimally compressed, narrow pulse peak at the filter output of a correlation filter for the purpose of reception, the interfering secondary maxima of the mathematical filter function must be zero. The invention uses specially designed signal codes which are used to generate the associated complementary signal code from the received code by means of simple logic functions in the reception filter. The subsequent parallel formation of the filter functions of the received signal code and the complementary signal code exhibits secondary maxima having an opposite mathematical sign, thus resulting in the desired perfect pulse peak having secondary maxima which are equal to zero during summation at the filter output. The essence of the method is, that only one single CDMA code has to be transmitted and is simply converted into the perfect signal pulse in synchronous as well as in asychronous mode* within the novel receiver filter. The receiver logic provides for the super-orthogonality and thus perfectly separates the user signals without interference limitations.
Germany DE 102009014480 B4, DE 102011075650 B4, Europe www.google.com/patents/EP2412104A1, http://www.google.com/patents/EP2689535A1 (patent issuance announced) and USA www.google.com/patents/US8423598, http://www.google.com/patents/US873719 and Publication No. US-2014-0369176-A1 amended by continuation in part (*here the asynchronous mode is explained).

Conclusion

"The joint effect of ideal cross-correlation functions and ideal auto-correlation functions makes a CDMA system using them virtually interference-free, making our dream come true: to make a truly noise-limited CDMA system!" [page 5, Prof. Hsiao-Hwa Chen, The Next Generation CDMAbooks.google.com/.../The_Next_Generation_CD... -]

However, in contrary to Prof. Chen's approach, this new method is using only one single complementary code for transmission on a one-code-per-user basis. Also, the full set of codes is available for channelization. The summarized advantages for beyond 3G orthogonal CDMA, refer to pages 41 ff.,  H. H. Chen, "Development of the Next Generation CDMA Technology and Lessons We Learnt from the Past": e-Business and Telecommunications: International Conference, ICETE ... - books.google.com/books?isbn=3642051960

This innovation leads to the break-through for the next generation CDMA, making Prof. Chen's dream become a reality.