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LDPC codes 4girth check

B-IFDMA pdf document

利用DML算法和SML算法实现到达方位角的估计(Estimation of arrival azimuth using DML algorithm and SML algorithm)

这是一个相对完整的OFDM通信系统的仿真设计，包括编码，调制，IFFT， 上下变频，高斯信道建模，FFT，PAPR抑制，各种同步，解调和解码等模 块，并统括系统性能的仿真验证了系统设计的可靠性 (OFDM full version of the source code, including coding, modulation, IFFT, Upper and lower frequency, Gaussian channel model, FFT, PAPR suppression, a variety of synchronization, demodulation and decoding module, and system performance of the omnibus simulation verify the reliability of the system design)

树莓派串口调试程序，可实现与单片机或者手机等通信。(te serial port testing program which can communicate with single chip machine or android cell phone.)

该文档为一个实现ofdm子载波调制和解调的代码，利用QPSK和16QAM两种方式实现，并附有运行结果。(This document is an implementation of ofdm subcarrier modulation and demodulation of the code, the use of QPSK and 16QAM two ways, along with operating results.)

信道估计，有mmse 和ls估计，并有解释(Channel estimation, there are MMSE and LS estimates, and there are explanations)

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.)

说明：  一种基于多用户子载波分配的算法希望对大家有用。(Based on Multi-user subcarrier allocation algorithm for all of us hope that useful)

说明：  D2D通信实现资源分配算法的有关代码，用于提高下一代蜂窝网络中的频谱利用率的解决方案是设备到设备D2D(Device to Device）通信。(D2D communication implements code related to resource allocation algorithms. The solution for improving spectrum utilization in next generation cellular networks is device-to-device D2D (device-to-device) communication.)