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本书描述了4G LTE / 5G NR 无线接入技术。(This book describes LTE, developed in 3GPP and providing true fourth-generation (4G) broadband mobile access, as well as the new radio-access technology 3GPP is currently working on. Together, these two technologies will provide 5G wireless access.)

bpsk qpsk 16qam 64qam频带上的调制解调信号包括误码率曲线，眼图和星座图(bpsk qpsk 16qam 64qam modulation and demodulation)

　?　　bpsk信号的产生可用与仿真的输入信号(? Bpsk signals generated can be used with simulation of the input signal)

提供基本的基于能量检测的频谱感知功能，需要结合软件无线电外设USRP使用(Providing basic spectrum sensing capabilities based on energy detection requires the use of software radio peripheral USRP)

说明：  手机游戏模拟器 对于开发手机游戏的朋友来说很难得 。只有源代码 没有文档(Mobile phone game emulator for the development of mobile games for a rare friend. Not only the source code documentation)

利用自回归模型产生Rayleigh率落信道(use of regression models have Rayleigh rate charged Channel)

轨道角动量OAM雷达散射三维辐射方向图，(3D radiation pattern of OAM radar)

说明：  利用伪随机序列作为发送信号，经过信道，产生了频偏和相位偏移，利用数字锁相环的原理实现对信号的频率估计和相位估计，实现信号的载波同步。(The frequency offset and phase offset are generated by using pseudo-random sequence as the transmitting signal through the channel. The frequency estimation and phase estimation of the signal are realized by using the principle of digital phase-locked loop, and the carrier synchronization of the signal is realized.)

In this paper the various technologies available so far for wireless transmission of electricity and the need for a Wireless System of Energy Transmission is being discussed to find its possibility in actual practices, their advantages, disadvantages and economical consideration.

说明：  对片内RAM进行读写操作，通过数据的写入和读出，对RAM的操作进行熟悉。(Read and write ram on chip, and get familiar with RAM operation through data writing and reading.)