Analog and digital mixed precoding mode based on codebook

The invention discloses an analog and digital mixed precoding mode based on a codebook. According to the method, through using analog code training, equivalent channel information can be effectively obtained, thus the optimization problem of NP-hard of analog code selection and digital precoding is converted into the optimization problem of sparse digital precoding, according to the optimized digital precoding matrix, the analog precoding code of each link is mapped, and finally the mixed precoding of analog precoding and diginal precoding is realized. The near optimal system performance can be obtained, the system complexity is reduced, the energy efficiency is improved, and the realization of the system is ensured. 本发明公开了种基于码本的模数混合预编码方法，该方法通过使用模拟码字训练可以有效地获得等效信道信息，进而将模拟码字选择与数字预编码的NP难的优化问题转换为稀疏数字预编码的优化问题，并根据优化后的数字预编码矩阵，映射各链路的模拟预编码码字，最终实现模拟预编码和数字预编码的混合预编码。本发明可以获得接近最优的系统性能，降低系统复杂度及提升能源效率，保证系统的可实现性。