1、

This paper introduces the architecture of DVB_C system and basic theory of QAM modulation and demodulation at first, analyzing and discussing two ways to implement the initial demodulator: simple sequencer and generating native carrier to demodulate.

本文介绍了DVB-C系统的结构和QAM调制解调的基本原理及其系统结构;分析比较了初始解调电路的两种实现方式:产生本地载波进行解调和简单序列解调。

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2、

QAM modem has been widely used in telephone channel, and researches now focus on the area of wide-band communication with high data rate.

QAM调制解调已经在较低数据速率的电话信道中得到成熟应用,目前的研究集中在高数据率的宽带通信领域,取得了丰富的成果,但同时也面临大量的技术难点有待解决。

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3、

Both Quadrature Amplitude Modulation ( QAM) and Low Density Parity Check Code ( LDPC) are widely used in such fields as wireless communication, wired television transmission and satellite communication.

正交幅度调制(QAM)和低密度奇偶校验码(LDPC)技术应用于很广泛的领域,如无线通信、有线电视传输、卫星通信等领域。

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4、

This issue was just from the project QAM modulator, which accords with the national digital television standard DVB-C.Reed-Solomon ( RS) code is one class of the important linear block codes in the error control area.

本课题正是来源于符合国家数字电视DVB C标准的QAM调制器项目。RS(Reed Solomon)码是差错控制领域中一类重要的线性分组码。

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5、

So the square timing algorithm is selected for timing recovery of QAM signals and cubic interpolation is chosen for timing error correction. 2. Study the phase estimation algorithm for multi-antenna high-order QAM signals.

因此本文在高阶QAM解调中利用平方定时同步算法进行符号定时,并采用立方内插滤波器进行定时误差纠正。2、研究了多天线信号的相位估计算法。

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6、

Realization of variable rate symbol timing recovery in QAM demodulator

可变速率符号定时恢复在QAM解调器中的实现

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7、

Design of Jitter-Free Timing Recovery Scheme with Fast Tracking Capability for High Speed QAM Signal over HF Channel

一种短波高速QAM信号快速无抖动码元同步方案的设计

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9、

At the same time, M-QAM mapping can be used in OFDM for improving data transportation speed.

同时在OFDM调制时可以采用M-QAM映射方式,提高短波跳频系统的信息传输速率。

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10、

The Influence by Carrier Phase Error in Digital Image m-QAM Transmission System

数字图象m-QAM传输系统载波相位误差分析

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11、

Application of 16-QAM in BOX system

先进的16-QAM线性无线调制传输技术在BOX系统中的应用

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12、

In this paper, the mathematical model of QAM two dimensional digital communication system based on the Codex 9600 modem is given.

本文参照Codex9600调制解调器建立QAM二维数字通信系统的数学模型。

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13、

An all-digital QAM initial demodulator architecture is presented for HDTV receiver chip.

本文设计了一种适用于 高清晰 数字电视(HDTV)接收芯片的全数字正交幅度(QAM)解调器结构.

14、

Design and implementation of AHDL for 16 QAM modulator

16QAM调制器的AHDL语言设计与实现

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15、

The simulation is based on the QAM modulation pattern.

仿真是基于QAM的调制方式。

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16、

Design of wireless image transmission system based on QAM

基于正交幅度调制的无线图像传输系统设计

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17、

Application of QAM in the High Explosive Radio Telemetry Project

正交幅度调制(QAM)在高能爆炸无线电遥测系统中的应用

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18、

Simulation of digital sensor signal QAM technology based on communication channel

基于通信信道的数字传感信号正交幅度调制技术仿真研究

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19、

Analysis of the Effect and Compensation Method of Phase Noise in QAM System

相位噪声对QAM系统的影响及消除方法分析

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20、

Research of Improved QAM Techniques Application in PLC System

改进QAM调制技术在电力通信中的应用研究

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