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Description: 调制解调里的QPSK调制解调程序，用MATLAB实现。-modem's QPSK modulation and demodulation process, using MATLAB.
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Size: 1083 |
Author: 罗旋 |
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Description: QPSK调制Modem的C实现及文档说明
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Size: 57985 |
Author: curry0732 |
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Description: qpsk的调制解程序 包括在两种信道下的功率谱和星座图-qpsk the modem program includes two channels of the power spectrum and constellation
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Size: 1024 |
Author: vicky |
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Description: OFDM系统中的QPSK调制映射和调制解映射-QPSK modulation OFDM system mapping and modem mapping
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Size: 1024 |
Author: hangxu |
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Description: The purpose of the ‘Burst QPSK/16QAM Modulator’ is
the data transmission from the subscriber to the service
provider (upstream) via coax cable. Thus, its main
applications are cable modems at the subscriber’s
home. In such systems one headend cable modem
serves 500 to 2000 subscriber’s cable modems. The
connecting coax cable must be shared in upstream
direction. These multipoint-to-point connections are
controlled by one headend modem, which assigns time
slots for data transmission to the different cable
modems. Therefore the transmitter in the subscriber’s
cable modem must be able to transfer enclosed data
blocks in the assigned time periods (i.e. bursts) and
not to send continuously.
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Size: 9480192 |
Author: shri |
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Description: The purpose of the ‘Burst QPSK/16QAM Modulator’ is
the data transmission from the subscriber to the service
provider (upstream) via coax cable. Thus, its main
applications are cable modems at the subscriber’s
home. In such systems one headend cable modem
serves 500 to 2000 subscriber’s cable modems. The
connecting coax cable must be shared in upstream
direction. These multipoint-to-point connections are
controlled by one headend modem, which assigns time
slots for data transmission to the different cable
modems. Therefore the transmitter in the subscriber’s
cable modem must be able to transfer enclosed data
blocks in the assigned time periods (i.e. bursts) and
not to send continuously.
Platform: |
Size: 9216 |
Author: shri |
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Description: The purpose of the ‘Burst QPSK/16QAM Modulator’ is
the data transmission from the subscriber to the service
provider (upstream) via coax cable. Thus, its main
applications are cable modems at the subscriber’s
home. In such systems one headend cable modem
serves 500 to 2000 subscriber’s cable modems. The
connecting coax cable must be shared in upstream
direction. These multipoint-to-point connections are
controlled by one headend modem, which assigns time
slots for data transmission to the different cable
modems. Therefore the transmitter in the subscriber’s
cable modem must be able to transfer enclosed data
blocks in the assigned time periods (i.e. bursts) and
not to send continuously.
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Size: 12288 |
Author: shri |
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Description: 这是一个QPSK比较完整的FPGA工程，是用Verilog语言写的，主要包括调制解调模块。-This is a QPSK FPGA project is written in Verilog language, including the modem module.
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Size: 455680 |
Author: |
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Description: 基本的调制解调程序源码集，包含BPSK，，QPSK，QAM，GMSK等 可直接使用。
-The basic modem set of program source code, including for BPSK, QPSK, QAM, GMSK, etc. can be used directly.
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Size: 31744 |
Author: 消极 |
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Description: 根据软件无线电的思想，提出了一种新颖的数字信号处理算法，对QPSK信号的相位进行数字化处理，从而实现对QPSK信号的解调.该算法允许收发两端载波存在频差，用数字锁相实现收发端载波的同步，在频偏较大的情况下，估算频偏的大小，自适应设置环路的带宽，实现较短的捕获时间和较好的信噪性能。整个设计基于XILINX公司的ISE开发平台，并用Virtex-II系列FPGA实现。用FPGA实现调制解调器具有体积小、功耗低、集成度高、可软件升级、扰干扰能力强的特点，符合未来通信技术发展的方向。-According to the idea of software radio, a novel digital signal processing algorithm, the phase of QPSK digital signal processing, enabling the demodulation of QPSK signals. This algorithm allows the sending and receiving ends of the carrier frequency difference exists, using digital phase-locked to achieve synchronization of sending and receiving end of the carrier, in the case of large frequency offset, frequency offset estimation of the size, adaptive set the loop bandwidth to achieve shorter acquisition time and better noise performance. The whole design is based on the company XILINX ISE development platform, and Virtex-II series with the FPGA. FPGA realization of a modem with a small size, low power consumption, high integration, software upgrades available, the characteristics of strong interference interference, in line with the future direction of ICT development.
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Size: 64512 |
Author: 马文 |
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Description: In many applications, it is economical for a single modem
to receive multiple modulation formats. In particular, the use of
BPSK and QPSK has become a defacto standard in many military
and NASA systems. However, there is significant interest in
employing 8PSK and 16PSK modulation in these same systems
today in order to conserve bandwidth.-In many applications, it is economical for a single modem
to receive multiple modulation formats. In particular, the use of
BPSK and QPSK has become a defacto standard in many military
and NASA systems. However, there is significant interest in
employing 8PSK and 16PSK modulation in these same systems
today in order to conserve bandwidth.
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Size: 377856 |
Author: lala |
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Description: QPSK经格雷码优化后过调制解调后的误码率误信率判决-After QPSK Gray code optimization via modem error rate over the mistaken belief that the rate of post-judgment
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Size: 1024 |
Author: haoyuguang |
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Description: 构建一个理想信道基本QPSK仿真系统,仿真结果有
a.基带输入波形及其功率谱
b信号及其功率谱
c.QPSK信号星座图
2.构建一个在AWGN（高斯白噪声）信道条件下的QPSK仿真系统，仿真结果有
a.QPSK信号及其功率谱
b.QPSK信号星座图
c.高斯白噪声信道条件下的误码性能以及高斯白噪声的理论曲线，要求所有误码性能曲线在同一坐标比例下绘制-qpsk modem emulation, plus white Gaussian noise
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Size: 2048 |
Author: 赵小样 |
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Description: 通信实验中BPSK,QPSK,2FSK,16QAM调制解调仿真代码，实现调制解调和星座图的观察.-Communication experiments BPSK, QPSK, 2FSK, 16QAM modulation and demodulation simulation code that implements the modem and observation constellation.
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Size: 5120 |
Author: 庞庞 |
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Description: QPSK modem. fast feedforward symbol sync farrow interpolator fast feedforward phase sync fast gain control
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Size: 14336 |
Author: D |
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Description: qpsk调制解调simulink文件，亲测可用-qpsk modem simulink file
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Size: 10240 |
Author: hzx |
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Description: QPAK的调制解调在MATLAB中的实现-QPAK modem realization in MATLAB
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Size: 6144 |
Author: renjinjun |
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Description: 介绍了qpsk调制解调及Dijkstra最短路径算法，并给出了仿真的结果和程序。-Introduced qpsk modem and Dijkstra shortest path algorithm, and the simulation results and procedures.
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Size: 219136 |
Author: 蓝珊一 |
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Description: QPSK调制是数字调制解调中
最为常见的调制方式之一，此Verilog
文件可以在FPGA上实现QPSK的调制方式-QPSK modulation is one of the most common digital modem modulation scheme, this Verilog file QPSK modulation scheme can be implemented on FPGA
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Size: 1024 |
Author: 陆从乐 |
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Description: The objective of this lab is to learn about BPSK and QPSK by building a QPSK modulator and demodulator. Building the QPSK Modulator and demodulator.
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Size: 162816 |
Author: Khan17
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