Method for constructing high-spectrum-efficiency multiple access communication system model

The invention discloses a high-spectral-efficiency multiple access communication system model construction method, which comprises the following steps of: firstly, adding error correction code words in an information code element sequence sent by a sending end, then carrying out LDPC (Low Density Parity Check) coding on an input information source, and then carrying out QPSK (Quadrature Phase Shift Keying) modulation; and after the NOMA technology and the NOMA solution technology, QPSK demodulation is carried out on the obtained information sequence, and LDPC decoding is carried out, so that the final information sequence received by the information sink is obtained. According to the method, the spectrum utilization rate of a communication system is remarkably improved, the robustness of the system is enhanced, the complexity of a decoding process is remarkably reduced, and efficient and reliable communication is realized. 本发明公开了一种高频谱效率多址接入通信系统模型构建方法，首先在发送端发送的信息码元序列中增加纠错码字，然后将输入的信源经过LDPC编码，再进行QPSK调制；之后再经过NOMA