We propose new carrier frequency acquisition and channel estimation algorithms based on the time-domain analysis of OFDM system.
本文根据OFDM系统特点，分析了OFDM系统的时域载波频率捕获和信道估计方法。
Based on a research institute of electronic technology 'project about TDRSS, in this thesis, carrier wave frequency acquisition of spread spectrum signal is studied and implemented.
本论文以某电子研究所研究项目为背景，主要研究了扩频信号载波频率捕获问题。
An appropriate sampling frequency is the key of the data acquisition system reliable work.
选择一个合适的采样频率是保证数据采集系统可靠工作的关键。
The jitter error brought in by the aperture jitter increases as the frequency increase of the input signal in high speed data acquisition systems, thus it degrades the system's SNR.
结果表明，孔径抖动引起的孔径误差随着高速数据采集系统输入信号频率的升高而增大，由此将引起系统信噪比的下降。
High-performance data acquisition is needed in some high speed and high precision measurements when signal measurements, image manipulation and audio frequency signal process are taken.
在信号测量、图像处理、音频信号处理等一些高速、高精度的测量中，都需要进行高性能数据采集。
As the dialogue window of the operator and the computer, the software can select acquisition channels and frequency.
作为人机对话的窗口，可以通过该软件对系统采集通道数和采样频率进行选择。
This system is designed by modularization, so it has high integration, wide application field, suits different frequency signal acquisition and analyse.
该系统采用模块化设计，集成度高、应用范围广，适合不同频率的信号采集与分析。
Experiment results prove that the system can acquire signals in the frequency range designed for sound card correctly, and can be applied in the domains of data acquisition and general analysis.
实验结果表明：该系统能够正确采集声卡设计频率范围内的信号，可用于该范围内的一般数据采集与应用。
And it has introduced such several kinds of typical modules as data acquisition, Controller, Frequency spectrum analysis and remote data transmission, etc.
并在此基础上，详细介绍了数据链接、控制器、频谱分析、远程数据传输等几种典型模块。
A construction layout about flexible, convent, new type, multi parameter, high accuracy, large volume data acquisition system for the Rubidium atomic frequency standard test is put forward.
提出了一种用于铷原子频标实验的灵活、方便的新型多参数、高准确度、大容量数据采集系统的构成方案。
This paper describes a novel joint acquisition algorithm of timing and carrier frequency for burst orthogonal frequency division multiplexing (OFDM) transmission system.
提出了一种新的正交频分多路（OFDM）传输系统定时和载波频率捕获联合算法。
In addition, a method is described that data acquisition frequency is controled by dividing frequency in software.
同时介绍了一种用软件分频方式控制数据采集频率的方法。
Three experiments were made to investigate the effects of the rated age of word acquisition (AoA) and word frequency on the identification of Chinese double character words.
三个实验考察词汇习得年龄和频率在词汇识别中的作用。
An acquisition method of frequency hopping signal in a TDMA system is presented in this paper.
本文提出一种时分多址跳频信号的捕获方法。
The effect of clock jitter and phase noise on data acquisition system performance is more profound as the increase of sampling frequency and the bit of A/D converter.
随着采样频率和A/D变换器位数的增加，时钟抖动和相位噪声对数据采集系统性能的影响更加显著。
The sampling system that sample this high frequency signals is a high-speed data acquisition system.
对此例高频信号进行采样的系统，就是所谓的高速数据采集系统。
In contrast with general IP data acquisition, DNM expands frequency band of power, widens sampled time and raises detective rate.
与传统的激发极化数据采集方法相比，电场差分法增加了供电的周期，扩大了采样的时间区段，提高了采样的速度。
AIM To develop demodulation methods with high anti-noise ability and high speed for data acquisition system inelectrical impedance multi-frequency and parameter tomography.
目的研究一种用于电阻抗多频及参数成像数字采集系统的具有高抗噪性能和快速的解调方法。
The thesis presents the design and realization of a data synchronous acquisition system in integrated protection based on FPGA and digital frequency multiplying technique.
本论文的任务是设计并实现基于FPGA及数字倍频技术的集成保护中数据同步采集系统。
According to the noise test frequency range, select the appropriate data acquisition board and complete the evaluation system of collecting module.
针对低频噪声测试的频率范围，选择了合适的数据采集板卡，完成了评价系统的采集模块。
Besides, the target echo signal is often weak with strong noise, so data acquisition (DAQ) card should sustain high sampling frequency and resolution.
由于目标回波的低信杂比，需要采集卡具有较高的采样率和分辨率。
The audio frequency inspection system is mainly composed of the impulse excitation device, acoustic sensor, signal conditioning circuits, data acquisition card and micro-computer and so on.
音频检测系统主要由脉冲激励装置、音频传感器、信号调理电路、数据采集卡和微型计算机等部分组成。
GPS digitized intermediate frequency signal sampler was used to validate the algorithm of acquisition and tracking of software receiver.
采用GPS中频信号采样器采集实际GPS数据，对搜索和跟踪算法进行了验证。
Sorceress acquisition range increased to 700 from 600, improving the frequency with which Slow is auto-cast.
女巫技能射程从600提高至700，提高自动施放缓慢的频率。
The system has the advantages of higher acquisition frequency and faster data communication, which has been applied in the actual work of the seismic physical simulation with satisfactory results.
该系统具有采集精度高，传输速度快的特点，已经应用于地震物理模拟采集实际工作中，并取得满意效果。
This paper presents the resuhs of an investigation of the acquisition of English high-frequency words by Chinese non-English major college students.
本文对非英语专业大学生英语高频词汇习得情况进行了描述和分析。
This paper presents the resuhs of an investigation of the acquisition of English high-frequency words by Chinese non-English major college students.
本文对非英语专业大学生英语高频词汇习得情况进行了描述和分析。
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