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文章针对传统正交频分复用技术带外辐射大、同步开销大且要求高等不足,本文将网格时频构造特征引入到多载波并行传输,在兼容LTE协议的前提下,重点就网格化过程中发送间隔、频率间隔设置等具体问题进行研究。文中还通过数值测试对波形尺度进行检测和优化,并给出了最终尺度。数值测试结果表明,网格化改进后的多载波信号在保证良好正交化水平的同时,在非理想信道条件下还可使接收端ISI/ICI总体水平得到进一步降低,从而为恶劣信道条件下的传输业务提供更为高效且灵活的接入信号。
In this paper, the traditional Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing) technology with large out-of-band radiation, large synchronization overhead and high requirements, this paper introduces the grid time-frequency structure features into multi-carrier parallel transmission, under the premise of compatible LTE protocol, The process of sending interval, set the frequency interval and other specific issues to study. The paper also tests and optimizes the waveform scale by numerical test and gives the final scale. Numerical results show that the improved multi-carrier signal can reduce the overall level of ISI / ICI at the receiving end under the condition of poor channel, while ensuring good normalization. Of the transmission business to provide more efficient and flexible access signal.