On increasing OFDM method frequency efficiency opportunity

OFDM-SFN or OFDM-MFN methods are used in DVB-T and DAB systems. In the case of MFN there are problems with frequency efficiency. This article presents a new multiplexing technique, which combines OFDM and CDMA features. It solves some problems of these methods. This new method solves some of the problems of OFDM-MFN and other wireless OFDMA systems, namely increasing frequency efficiency.