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找到约 52 项符合 ORthogonal 的查询结果

学术论文 基于FPGA全数字OFDM收发信机

正交频分复用(OFDM,Orthogonal Frequency Division Multiplexing)技术作为一种可以有效对抗信号波形间干扰的高速传输技术,引起了广泛关注。它利用许多并行的、传输低速率数据的子载波来实现高速率的通信。它的特点是各子载波相互正交,所以扩频调制后的频谱可以相互重叠,不但减小了子载波问的相互干扰,还大大提高了频谱 ...
https://www.eeworm.com/dl/514/13029.html
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模拟电子 基于CORDIC算法的高速ODDFS电路设计

为了满足现代高速通信中频率快速转换的需求,基于坐标旋转数字计算(CORDIC,Coordinate Rotation Digital Computer)算法完成正交直接数字频率合成(ODDFS,Orthogonal Direct Digital Frequency Synthesizer)电路设计方案。采用MATLAB和Xilinx System Generator开发工具搭建电路的系统模型,通过现场可编程门阵列(FPGA ...
https://www.eeworm.com/dl/571/20437.html
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通信网络 一种降低OFDM系统PAPR联合算法的研究

选择映射法(SLM)和概率类算法都可以降低OFDM (Orthogonal Frequency Division Multiplexing)系统的PAPR(Peak to Average Power Ratio),传统SLM算法自身较为复杂,但由于其优良的性能,弃之可惜。研究表明,SLM算法和限幅类算法在性能上具有一定的互补性。任何一个算法未必能达到抑制PAPR的理想效果,在深入研究了两 ...
https://www.eeworm.com/dl/564/32782.html
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通信网络 OFDM系统中降低峰均功率比的研究

正交频分复用技术(Orthogonal Frequency Division Multiplexing, OFDM)非常适合高速通信系统,但存在高峰均功率比(PAPR)的问题。对OFDM系统中如何降低PARR的问题进行了研究,讨论了降低PAPR的主要方法,重点分析了选择性映射法(SLM),并在此基础上提出了一种基于预编码矩阵的改进算法,最后通过matlab进行了算法仿真 ...
https://www.eeworm.com/dl/564/33026.html
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无线通信 克服了正交频分复用(OFDM)和IEEE 1901.2智能电网通信的挑战

Abstract: While many questions still surround the creation and deployment of the smart grid, the need for a reliablecommunications infrastructure is indisputable. Developers of the IEEE 1901.2 standard identified difficult channel conditionscharacteristic of low-frequency powerline communications ...
https://www.eeworm.com/dl/510/36256.html
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无线通信 降低OFDM信号PAPR的方法研究

正交频分复用 (Orthogonal Frequency Division Multiplexing,OFDM)是一种多载波调制技术,由于具有良好的抗多径干扰性能,适用于高速数据传输,OFDM成为近年来人们研究的热点。但是其峰均比较高,应用受到了限制,因此有必要研究降低PAPR的方法。本文首先介绍了OFDM的基本原理和PAPR的基本概念,然后讨论了目前常用的 ...
https://www.eeworm.com/dl/510/36455.html
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其他 空时正交编码源程序

空时正交编码源程序,参考文献: V.Tarokh,H. Jafarkhani,and A. R. Calderbank "Space-Time Codes from %Orthogonal Designs",IEEE Trans. Inform. Theory VOL. 45,NO. 5,JULY 1
https://www.eeworm.com/dl/534/177944.html
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邮电通讯系统 This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the fr

This program simulates the bit-error-rate (BER) performance of OSTBC with L=4 antennas over the frequency flat Rayleigh block fading channel The code is developed for real orthogonal design, code rate 1/2 modulation- 16 QAM with gray coding resulting in 2 bits/sec/Hz.
https://www.eeworm.com/dl/690/272493.html
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文件格式 This project aim was to build wireless software modem for data communication between two computers

This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (fr ...
https://www.eeworm.com/dl/639/272495.html
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其他书籍 OFDM Modem Applications &#8226 Digital Video Broadcast (DVB) &#8226 Digital Audio Broadcast (DAB)

OFDM Modem Applications &#8226 Digital Video Broadcast (DVB) &#8226 Digital Audio Broadcast (DAB) &#8226 Broadband Wireless Access (802.16x) &#8226 Wireless LAN (802.11x & HiperLAN) Orthogonal OFDM Sub-carriers Orthogonal Frequency Division Multiplexing (OFDM)
https://www.eeworm.com/dl/542/274842.html
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