2 results about "Matched filter" patented technology

The invention discloses a NOMA system based on multi-wavelet pulse forming. At a sending end of the NOMA system, after signal mapping and OFDM modulation processes are respectively carried out on transmission signals, a plurality of filters obtained based on a plurality of wavelets are utilized to respectively carry out pulse forming on different sending users, and then power distribution and signal superposition are carried out to integrate and carry out low-pass filtering on the signals of the sending users and then send the signals; at a receiving end, firstly, low-pass filtering is carriedout, then matching filtering is carried out on different receiving users by adopting matching filters corresponding to sending users through corresponding SIC processes, and after OFDM demodulation and signal demapping, a transmission signal is recovered. According to the invention, the BER performance of the NOMA system can be effectively improved, and the improvement is less influenced by the power distribution ratio, so that the transmission reliability of the NOMA system and the practical feasibility of the NOMA technology are improved.