The error correcting and decoding, interleave and and DMT modulation and demodulation are analyzed in detail.
分析了信道编译码方法、交织与解交织及DMT调制与解调等关键技术。
Error propagation caused by noise can be avoided by precoding the data at the transmitter prior to modulation and decoding operation of received signals.
在调制信号前采用数据预编码，对接收信号进行相应译码，以消除信道中噪声引起的差错传播。
The algorithm is verified by experiments and the modulator can produce digital modulation signals with good EVM(Error Vector Magnitude) and spectrum mask.
通过验证，所产生的调制信号具有良好的误差向量幅度（EVM）和频谱特征。
In multimedia signal processing, quantization error is a function of input signal and it results in the audible distortion and noise modulation in the audio signals.
在多媒体信号处理中，由于量化误差是输入信号的函数，使得语音信号产生信号失真和噪声调制。
Since the synchronization error is independent of information signal, the chaotic modulation for large amplitude and fast varying information signals can be achieved.
由于同步误差与信息信号无关，从而实现了大幅度、快时变信息信号的混沌调制通信。
After the unequal error protection of multilevel coded modulation is discussed in detail, a non-uniform signal constellation applied to 8ask modulation is designed.
在详细分析了多级编码调制的不等错误保护原理的基础上，设计了一种针对8ask调制的非均匀信号星座。
The orthogonal multicarrier modulation, which is the main character of OFDM, determines that it is very sensitive to both timing synchronization error and carrier frequency offset.
OFDM系统自身的正交多载波调制特点，决定了其对定时误差和载波频率偏差十分敏感。
The error performance of continuous phase modulation (CPM)with optimal coherent detection depends on its minimum squared Euclidean distance(MSED).
连续相位调制的最佳相于解调的误码性能取决于其最小平方欧氏距离。
The computer simulation is performed, and the results show that when the distance on measure is certain, the coefficient of the intensity modulation will decrease with the fixing error increasing.
计算机仿真结果表明，当待测距离一定时，光强调制系数随着安装误差的增大而减小。
The error performance of continuous phase modulation (CPM) with optimal coherent detection depends on the minimum squared Euclidean distance (MSED).
连续相位调制(CPM)的最佳相干解调的译码性能取决于其最小平方欧氏距离。
Based on the output-voltage error function, a novel time-discrete modulation technique is proposed for matrix converters (MCs) and time-discrete difference equations of a MC circuit are derived.
针对矩阵变换器调制方式的特点，提出了基于输出电压误差函数分析的矩阵变换器离散调制技术，推导了基于时间离散和差分原理的电路方程。
Firstly, ALE system's base content is introduced, then an analysis of ALE system's structure and design is put forward, and then 8cpfsk modulation theory and error control technique are discussed.
本文首先介绍了ALE协议的基本内容，分析了ALE系统的结构和设计思路，然后对8cpfsk信号的调制解调技术、差错控制技术进行了理论研究。
On the sending end, the paper focuses on Error Control Coding, Waveform Shaping, Spread Spectrum and 8PSK modulation, etc.
在发送端，主要研究了差错控制编码，波形成形、扩频和8PSK调制等关键技术；
Firstly, the basic principles and the key techniques of access system is introduced, which includes modulation, error control, multi-address access, and embedded-system techniques.
文章首先详细介绍了接入系统的基本原理和关键技术，包括调制技术、差错控制技术、多址接入技术、嵌入式系统技术。
Starting from the precise pair-wise error probability (PEP), the joint border of group coding signal error probability (SEP) in differential unitary space-time (DUST) modulation is deduced.
从精确成对错误概率(PEP)出发，推导得到了DUST调制群码符号误码率(sep)的联合边界。
The modulation effect of the bias of rate biased ring laser gyro is analysed. The error which is induced by the bias of rate biased ring laser gyro is analysed through digital simulation.
分析了速率偏频激光陀螺的偏频转台对陀螺漂移的调制效应，通过数字仿真定量分析了速率偏频激光陀螺漂移引起的导航参数误差。
Digital television transmission system based on the OFDM consists of Error correction processing and digital modulation parts etc.
基于OFDM的数字电视传输系统由纠错处理和数字调制等组成。
Based on linear frequency modulation continuous wave (FMCW) technique, we have developed a distance measurement method for non contact and non integrating error measurement.
给出一种以频率调制连续波（FMCW）技术为基础的进行无接触、无累加误差和较大动态范围距离测量方法。
The system comprises the target trajectory calculation module, the error calculation module, the satellite navigation parameters generation module, and the signal modulation module, etc.
系统主要包含目标运动轨迹计算、误差计算、导航电文生成及信号调制发射等功能模块。
For the modulation part of the design, traditional DDS technology is improved to implement CPFSK modulation. As a result, the performance of spur and error of digital part are optimized.
调制部分实现CPFSK调制，对传统的DDS技术进行改进，使其数字部分的杂散性能改善且具有较低的相位连续误差。
A single carrier modulation scheme suitable for use in high frequency communication systems is provided that achieves improved residual frequency error and phase noise estimation.
提供了一种实现改进残留频率误差和相位噪声估算的、适合于在高频通信系统中使用的单载波调制方案。
Based on the model, the BER Bit Error Ratio performance is analyzed for narrow-band modulation and wide-band spread -spectrum modulation of coherent PSK Phase Shift Key...
结果表明移动卫星信道中存在的多径和阴影现象使系统的误码性能恶化，而采用宽带扩频调制则可极大改善系统的性能。
Furthermore, the expression of stationary bit error rate of system output corresponding to equiprobability quaternary pulse amplitude modulation (PAM) input signals was deduced.
给出了当输入信号为等概率的四进制脉冲幅值调制（PAM）时，系统输出理论渐近误码率计算公式。
Based on analyzing the two multiple modulation schemes, the expressions of symbol error rate (SER) are presented and the system performances are compared.
在对两种多进制调制方式进行分析的基础上，分别给出了系统误符号率(SER)的表达式并进行了仿真比较。
Emulate experiments and lake experiment obtained lower error code rate than traditional waveform design method using this waveform structure with multiple phase shift key modulation.
以多进制相位调制方式采用这种波形结构进行了仿真实验和湖水试验，都获得了比传统的波形结构更低的误码率。
By simulating the modulation process using MATLAB, the influence of different power spectrum estimation algorithm to the bit-error-rate performance of the demodulation technique is analyzed.
通过Matlab仿真了调制解调过程，分析了三种功率谱估计算法对解调误码性能的影响。
Phase shift error is inevitable in the course of getting modulation value of 3-d measurement with phase shifting technology, and then decreases measurement precision.
通过相移技术获取调制度值的调制度三维测量法，不可避免地存在相移误差，从而降低测量精度。
The measurement error is found to decrease with the increase of the modulation current and this relation is applied to finding the optimum experimental condition for the short distance measurement.
分析测量误差与调制电流大小的关系，进而确定短距离测距的最佳实验条件。
The result presents that when LAS-CDMA system using 16QAM modulation under AWGN channel, the error probability of sphere decoding goes to theory error probability of ML algorithm.
介绍了球译码算法的工作原理，给出了算法流程；研究结果表明AWGN信道下LAS-CDMA系统使用16QAM调制时，球译码算法差错率趋近于使用基于ML算法的理论差错概率。
The result presents that when LAS-CDMA system using 16QAM modulation under AWGN channel, the error probability of sphere decoding goes to theory error probability of ML algorithm.
介绍了球译码算法的工作原理，给出了算法流程；研究结果表明AWGN信道下LAS-CDMA系统使用16QAM调制时，球译码算法差错率趋近于使用基于ML算法的理论差错概率。
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