SEMI E5-1104 SEMI EQUIPMENT COMMUNICATIONS STANDARD 2 MESSAGE CONTENT (SECS-II)

OFDMA系统频率同步算法综述-Orthogonal frequency division multiple access (OFDMA) has recently attracted vast research attention from both academia and industry and has become part of new emerging standards for broadband wireless access. Even though the OFDMA concept is simple in its basic principle, the design of a practical OFDMA system is far from being a trivial task. Synchronization represents one of the most challenging issues and plays a major role in the physical layer design. The goal of this paper is to provide a comprehensive survey of the latest results in the field of synchronization for OFDMA systems, with tutorial objectives foremost. After quantifying the effects of synchronization errors on the system performance, we review some common methods to achieve timing and frequency alignment in a downlink transmission. We then consider the uplink case, where synchronization is made particularly difficult by the fact that each user’s signal is characterized by different timing and frequency errors, and the base station has thus to estimate a relatively large number of unknown parameters. A second difficulty is related to how the estimated parameters must be employed to correct the uplink timing and frequency errors. The paper concludes with a comparison of the reviewed synchronization schemes in an OFDMA scenario inspired by the IEEE 802.16 standard for wireless metropolitan area networks.

高通技术专家撰写，OFDMA技术基础，具备很强的指导意义，对于工作人员很有帮助

Andrea Goldsmith的经典书Wireless Communications的习题答案，Solution Manual for Wireless Communications Andrea Goldsmith

Simulation and Software Radio for Mobile Communications.

信号处理的经典教材，统计信号处理的基础书。

这是关于无线通信的一本经典教材，作者Andreas F. Molisch 曾写过第一版，这是第二版。

Simple Serial MaxMSP
Arduino int inByte = 0; // incoming serial byte void setup() { Serial.begin(9600); pinMode(13, OUTPUT); // connect an LED here } void loop() { Temple University School of Communications and Theater Physical Computing Spring 2010 Chris Vecchio • Serial.read receives one byte at a time • Click on MaxMSP “97” message: Arduino pin 13 goes high • Click on MaxMSP “98” message: Arduino pin 13 goes low • These numbers are single ASCII byte values, arbitrarily chosen

WIRELESS COMMUNICATIONS Andrea Goldsmith Stanford University

ldpc matlab代码用于 5G 无线通信的信道编码架构使用高级综合 动机和目标 在当今瞬息万变的世界中，对移动互联网的需求与日俱增。 第四代 (4G) 系统现已在全球范围内使用。 由于移动互联网用户数量的急剧增加，当今的 4G LTE 还存在一些挑战，例如更高的数据速率和频谱效率。 这导致我们将 4G 系统的 Turbo 码替换为承诺更高吞吐量的信道码。 从那时起，3GPP 就接受了 LDPC 码作为 5G 无线通信的信道编码方案，正在进行大量的研究来优化解码器。 在5G中，LDPC码和极性码分别用于数据通道和控制通道的纠错。 第五代系统的主要目标是更高的数据速率、更高的频谱效率、更高的吞吐量、更高的带宽和更高的能效，同时在更低的延迟下也是如此。 信道编码在任何无线通信系统中都起着至关重要的作用。 我们的项目为第五代无线通信的低密度奇偶校验码提供了一种新颖的高效高吞吐量编码器和解码器。 这项工作提出了实现 LDPC 码高吞吐量信道编码架构的策略。 所提议的设计以较低的延迟实现峰值吞吐量，满足 5G NR 标准的吞吐量和延迟要求。 建议的设计首先在 Matlab 中实现。 经过验证