Description: 老师给的一个范本，关于4PSK的调制解调，频偏。用MATLAB仿真-Teachers to a model on the modulation and demodulation 4PSK, frequency offset. Simulation using MATLAB Platform: |
Size: 1024 |
Author:崔海波 |
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Description: 直接扩展频谱通信系统的伪随机码相位和频偏的串行捕获程序。-Direct spread spectrum communication system of pseudo-random code phase and frequency offset of the serial capture program. Platform: |
Size: 123904 |
Author:quark |
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Description: 大频偏环境下的长码捕获问题，期刊文献，供研究长码捕获问题的朋友参考-Large Frequency Offset circumstances the issue of long-Code Acquisition, journal literature, research chief for Code Acquisition friends refer to issues Platform: |
Size: 227328 |
Author:YangJun |
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Description: OFDM的最新IEEE的文档，用于信道和载波频偏的联合估计算法，比较前沿-OFDM latest IEEE documents, for the channel and the joint carrier frequency offset estimation algorithm to compare the forefront of Platform: |
Size: 240640 |
Author:LILI |
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Description: 解调时考查频率偏移量的一种鉴频算法 采用了双滤波器结构-Demodulator when the test frequency offset of a frequency algorithm uses a dual-filter structure Platform: |
Size: 6144 |
Author:caomin |
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Description: 异步FIFO是用来适配不同时钟域之间的相位差和频率飘移的重要模块。本文设计的异步FIFO采用了格雷（GRAY）变换技术和双端口RAM实现了不同时钟域之间的数据无损传输。该结构利用了GRAY变换的特点，使得整个系统可靠性高和抗干扰能力强，系统可以工作在读写时钟频率漂移达到正负300PPM的恶劣环境。并且由于采用了模块化结构，使得系统具有良好的可扩充性。-Asynchronous FIFO is an important module which always used to absorb the phase and frequency offset between different clock domain in communication area .In this paper, an FIFO module is designed using Gray convert technology and dual-port ram , which realizing scatheless transmit between different clock domain. The advances of Gray (Only one bit changes between neighboring two clock ) improves the reliability and anti-jamming capability of the system. And the system can work normally in the bad condition which the phase and frequency offset target to 300PPM. It is proved by work that the FIFO module can fulfill the demands of real-time of data transmitting system, and the module is powerful enough for more data process in the future. Platform: |
Size: 81920 |
Author:雷志 |
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Description: 扩展的直序扩频系统，包括了同步，信道估计，频偏和频偏估计-Expansion of the Direct Sequence Spread Spectrum system, including synchronization, channel estimation, frequency offset and frequency offset estimation Platform: |
Size: 21504 |
Author:huwedavid |
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Description: 频率偏差估计由信道参数估计和频率偏差估计两部分组成 环路滤波器设计-Frequency offset is estimated by the channel parameter estimation and frequency offset is estimated that two-part loop filter design Platform: |
Size: 94208 |
Author:王琴 |
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Description: OFDMA上行链路频偏干扰消除的所有算法总结
都是很经典的算法-OFDMA uplink frequency offset interference cancellation of all algorithms is very classic algorithm summary Platform: |
Size: 1492992 |
Author:LILI |
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Description: Simulation to use homodyne procedure for estimating the time of arrival and the frequency offset of received pulse from acoustic transducer. Platform: |
Size: 2048 |
Author:bweals |
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Description: ofdm粗频偏估计程序，包含5个模块，基于PN序列的同步-ofdm coarse frequency offset estimation procedures, including the five modules Platform: |
Size: 91136 |
Author: |
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Description: In this paper, a novel demodulation structure in
high-frequency (HF) channel is introduced and studied.Frequency-offset estimation, ractionally spaced adaptive equalization and carrier recovery techniques are involved.Frequency-offset correction is carried out based on channel impulse response estimation. ractionally spaced adaptive equalization and carrier recovery are combined with nonlinear decision feedback loop structure and the initial value
of tap coefficients of equalization are obtained from the previous channel estimation. Simulation is conducted under channel parameters with respect to MIL-STD-188-110B using a Monte Carlo technique. The results show this novel demodulation structure is feasible and efficient in HF channel, the symbol error ratio can reach to 10− 3 in 12dB SNR.-In this paper, a novel demodulation structure in
high-frequency (HF) channel is introduced and studied.Frequency-offset estimation, ractionally spaced adaptive equalization and carrier recovery techniques are involved.Frequency-offset correction is carried out based on channel impulse response estimation. ractionally spaced adaptive equalization and carrier recovery are combined with nonlinear decision feedback loop structure and the initial value
of tap coefficients of equalization are obtained from the previous channel estimation. Simulation is conducted under channel parameters with respect to MIL-STD-188-110B using a Monte Carlo technique. The results show this novel demodulation structure is feasible and efficient in HF channel, the symbol error ratio can reach to 10− 3 in 12dB SNR. Platform: |
Size: 186368 |
Author:Lin |
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Description: INTER-CARRIER INTERFERENCE CANCELLATION FOR OFDM SYSTEMS:
Orthogonal Frequency Division Multiplexing (OFDM) is an emerging multi-carrier modulation scheme, which has been adopted for several wireless standards such as IEEE 802.11a and HiperLAN2. A well-known problem of OFDM is its sensitivity to frequency offset between the transmitted and received carrier frequencies. This frequency offset introduces inter-carrier interference (ICI) in the OFDM symbol. This project investigates three methods for combating the effects of ICI: ICI self-cancellation (SC), maximum likelihood (ML) estimation, and extended Kalman filter (EKF) method. These three methods are compared in terms of bit error rate performance, bandwidth efficiency, and computational complexity. Through simulations, it is shown that the three techniques are effective in mitigating the effects of ICI. For high values of the frequency offset and for higher order modulation schemes, the ML and EKF methods perform better than the SC method. Platform: |
Size: 390144 |
Author:redami |
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Description: 16QAM载波同步的影响仿真，针对有频偏，有相偏，无频偏相偏情况下的星座图。-16QAM carrier synchronization of simulation, for a frequency offset, a phase offset, phase offset without offset under the constellation. Platform: |
Size: 1024 |
Author:吴明钦 |
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Description: 文章对几种常用的基于循环前缀(CP)的最大似然同步算法进行了分析，并对其频偏估计方差进行了比较；同
时针对基于CP 的同步算法在多径衰落信道下性能较差的情况，提出了一种改进的CP 同步算法并进行了仿真，结果表明相比
于原ML 算法，文中算法在多径信道下可有效提高频偏估计性能。-】This paper does some research on multiple maximum-likelihood (ML) algorithms based on cyclic prefix
(CP) and compares variances of frequency-offset estimation After the analysis of the bad performance of CP based
algorithms in multi-path fading channels, an improved CP algorithm is proposed and the simulation shows that this
algorithm can improve its performance effectively in multi-path fading channels. Platform: |
Size: 804864 |
Author:卫海宁 |
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