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: 基于MATLAB的正交相移键控QPSK编程,根据信号流程编写源程序,并通过时域图表示信号流程-MATLAB based on the Quadrature Phase Shift Keying QPSK programming, signal flow in accordance with the preparation of source code, and through time-domain signal flow graph Platform: |
Size: 1024 |
Author:小猪 |
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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: .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: digital modulation of the bit sequence, frequency modulation, amplitude modulation, phase shift keying, frequency shift keying Platform: |
Size: 1024 |
Author:sherry |
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Description: This script simulates the Binary Phase Shift keying. Since BPSK is a digital modulation scheme, you can modulate as many bits as you want. however, I have only simulated it for few bits, so that the results are visible.
This is code for BPSK only, means it can only modulated two digital states on two different phases.
I hope this will help out students and instructors alike.
MATLAB release MATLAB 7.7 (R2008b) Platform: |
Size: 2048 |
Author:Rafal |
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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 - phase shift keying