Description: We address the problem of blind carrier frequency-offset (CFO) estimation in quadrature amplitude modulation,
phase-shift keying, and pulse amplitude modulation
communications systems.We study the performance of a standard
CFO estimate, which consists of first raising the received signal to
the Mth power, where M is an integer depending on the type and
size of the symbol constellation, and then applying the nonlinear
least squares (NLLS) estimation approach. At low signal-to noise
ratio (SNR), the NLLS method fails to provide an accurate CFO
estimate because of the presence of outliers. In this letter, we derive
an approximate closed-form expression for the outlier probability.
This enables us to predict the mean-square error (MSE) on CFO
estimation for all SNR values. For a given SNR, the new results
also give insight into the minimum number of samples required in
the CFO estimation procedure, in order to ensure that the MSE
on estimation is not significantly affected by the outliers. Platform: |
Size: 1265664 |
Author:吴大亨 |
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Description: ASK（二进制幅度键控）是一种最简单的数字信号的载波传输，本文通过对数字信号的2ASK调制，解调在不同信噪比的情况下误码率分析，得出不同信噪比下的误码率。
通过对2ASK的仿真更好的理解了数字调制系统的组成以及各模块的功能。
-ASK (binary amplitude shift keying) is a simple digital signal carrier transmission, this paper 2ASK digital signal modulation, demodulation signal to noise ratio in different circumstances BER analysis, have come to different SNR BER. Simulation 2ASK through a better understanding of the digital modulation system, as well as the function of each module. Platform: |
Size: 52224 |
Author:徐丽丽 |
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Description: 本文利用核心芯片TDA5051A，采用ASK（幅度键控）调制技术，建立电力线通信系统，实现数字信号在电力线上进行传输。
关键词:电力线通信 TDA5051A 调制解调器
-In this paper, the core chip TDA5051A, using ASK (amplitude shift keying) modulation technology, the establishment of power line communication systems, digital signal transmission in the power line.
Keywords: PLC modem TDA5051A Platform: |
Size: 1222656 |
Author:黄增华 |
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Description: 研究相关瑞利衰落信道上MIMO系统中组合发射机选择合并(SC)／4t-收机最大比合并(MRC)的天线分集系统性能。使用矩生成函数方法，推导相关瑞利衰落信道上采用组合SC／MRC天线分集和相干检测的M 进制相移键控(MPSK)，M进制正交幅度调制(MQAM)，M 进制脉冲幅度调制(MPAM)等几种M 进制数字调制方式的误符号率精确表达式。数值计算结果阐明相关性和天线阵结构对采用组合SC／MRC天线分集的几种M 进制数字调制方式的平均误符号率性能的影响。-Research related to Rayleigh fading MIMO channel transmitter system to choose the combined portfolio (SC)/4t-collection machine maximal-ratio combining (MRC) diversity antenna system performance. The use of moment generating function method, Rayleigh fading channel is derived using the relevant combination of SC/MRC antenna diversity and coherent detection of M-ary phase shift keying (MPSK), M M-ary quadrature amplitude modulation (MQAM), M-band pulse amplitude modulation (MPAM), such as several M-band digital modulation modes of expression of symbol error rate of accuracy. The numerical results clarify the relevance and structure of antenna arrays using combinations of SC/MRC antenna diversity of several M-band digital modulation of the average symbol error rate performance. Platform: |
Size: 238592 |
Author:dingyuwen |
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Description: 基于Systemview的通信系统的仿真
主要是运用Systemview软件对二进制振幅键控（2ASK）系统、二进制移频键控（2FSK）系统、二进制移相键控（2PSK）系统以及二进制差分相位键控（2DPSK）系统进行设计，然后对设计的系统进行仿真，这其中分别包括它们的调制和解调系统。-Systemview based simulation of communication systems is the use of software Systemview binary amplitude shift keying (2ASK) system, the binary frequency shift keying (2FSK) system, the binary phase shift keying (2PSK) systems, as well as differential binary phase shift keying (2DPSK) system design, and then design a system simulation, which, respectively, including their modulation and demodulation system. Platform: |
Size: 877568 |
Author:lsp |
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Description: 数字通信系统振幅键控ASK信号和频移键控FSK的调制与解调的VHDL代码-ASK amplitude shift keying digital communication system signal and the frequency shift keying modulation and demodulation of the VHDL code for Platform: |
Size: 2048 |
Author:lihao |
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Description: .FSK、PSK、ASK调制原理 在数字通信系统中，数字基带信号通常要经过数字调制后再传输。常见的调制方式有频移键控（FSK）、相移键控（PSK）、幅移键控（ASK）-. FSK, PSK, ASK modulation principle in digital communication systems, digital baseband signal is usually subject to digital modulation and then transmitted. Common modulation methods are frequency-shift keying (FSK), phase shift keying (PSK), amplitude shift keying (ASK) Platform: |
Size: 157696 |
Author:xu |
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Description: Quaternary Amplitude Shift Keying
clear all
M=3
NPoints=input( Enter the number of points>> )
NumberBits=input( Enter the number of points per bit>> )
Signal Constellation of ASK
for i=1:NPoints
m=round(rand(1)*3)
data(i)=2*m-1-M
end
scatterplot(data)
grid on
for i=1:round(NPoints/NumberBits)
m=round(rand(1)*3)
for j=1:NumberBits
A(i,j)=2*m-1-M
end
end
figure(2) - Quaternary Amplitude Shift Keying
clear all
M=3
NPoints=input( Enter the number of points>> )
NumberBits=input( Enter the number of points per bit>> )
Signal Constellation of ASK
for i=1:NPoints
m=round(rand(1)*3)
data(i)=2*m-1-M
end
scatterplot(data)
grid on
for i=1:round(NPoints/NumberBits)
m=round(rand(1)*3)
for j=1:NumberBits
A(i,j)=2*m-1-M
end
end
figure(2) Platform: |
Size: 1024 |
Author:naresh |
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Description: 基于matlab的QAM调制与解调。正交振幅调制（QAM）是一种幅度和相位联合键控（APK）的调制方式。它可以提高系统可靠性，且能获得较高的信息频带利用率，是目前应用较为广泛的一种数字调制方式。
-Matlab based on the QAM modulation and demodulation. Quadrature amplitude modulation (QAM) is a joint amplitude and phase keying (APK) modulation method. It can improve system reliability, and can get higher bandwidth utilization of the information, which is the application of a relatively wide range of digital modulation methods. Platform: |
Size: 10240 |
Author:陆宇飞 |
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Description: 在现代通信原理课程中，在MATLAB中实现二进制幅移键控调制程序。-In modern communication theory course, to implement in MATLAB binary amplitude shift keying modulation program. Platform: |
Size: 75776 |
Author:李芳 |
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Description: Amplitude-shift keying (ASK) is a form of modulation that represents digital data as variations in the amplitude of a carrier wave.
Any din scheme uses a finite number of distinct signals to represent digital data. ASK uses a finite number of amplitudes, each assigned a unique pattern of binary digits. Usually, each amplitude encodes an equal number of bits. Each pattern of bits forms the symbol that is represented by the particular amplitude. The demodulator, which is designed specifically for the symbol-set used by the modulator, determines the amplitude of the received signal and maps it back to the symbol it represents, thus recovering the original data. Frequency and phase of the carrier are kept constant Platform: |
Size: 52224 |
Author:saikiran reddy |
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Search - amplitude shift keying