Description: 这是在AWGN信道下四相键控调制，以及其性能分析。-This is the AWGN Channel 4 phase shift keying modulation, as well as its performance analysis. Platform: |
Size: 50176 |
Author:wangping |
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Description: 偏移四相移相键控调制，也就是OQPSK，输出信号为OQPSK调制信号的复包络-Offset four-phase phase shift keying modulation, that is, OQPSK, the output signal for the OQPSK modulated signal complex envelope Platform: |
Size: 1024 |
Author:傲然寒风 |
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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: Minimum Shift Keying (MSK), uses two frequencies which are separated by 1/2T and phase discontinuity is avoided in symbol boundaries. Further, MSK transmission can also be visualized as a variant of offset-QPSK technique, where sinusoidals are used for pulse shaping instead of rectangular.
-Minimum Shift Keying (MSK), uses two frequencies which are separated by 1/2T and phase discontinuity is avoided in symbol boundaries. Further, MSK transmission can also be visualized as a variant of offset-QPSK technique, where sinusoidals are used for pulse shaping instead of rectangular.
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Size: 1024 |
Author:zeusZZ |
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Description: the code for four bit qpsk with 90 degrees phase shift with constellation and without constellation of noise is given Platform: |
Size: 1024 |
Author:rads |
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Description: 为了使数字信号在有限带宽的高频信道中传输，必须对数字信号进行载波调制。就频带利用率和抗噪声性能（或功率利用率）两个方面来看， QPSK系统最佳。QPSK是利用载波的四种不同相位差来表征输入的数字信息，是四进制移相键控（QPSK）。本项目用MATLAB软件对四进制移相键控信号在AWQN信道中传输进行了建模和仿真，通过对仿真得到的误码率和理论误码率进行比较和分析，从而证明了MATLAB软件仿真QPSK调制解调的可行性。-In order to make the digital signal in the high-frequency channel of limited bandwidth transmission of digital signal carrier modulation. Two in terms of bandwidth efficiency and anti-noise performance (or power utilization), QPSK system the best. QPSK, four different phase characterized by the input digital information using carrier quaternary phase shift keying (QPSK). This project using MATLAB software quaternary phase shift keying signal channel transmission in AWQN modeling and simulation, to compare and analyze the error rate obtained by the simulation and theoretical bit error rate, thus proving the simulation of MATLAB software QPSK modulation and demodulation of feasibility.- Platform: |
Size: 3072 |
Author:黄兰凤 |
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Description: QPSK调制全称Quadrature Phase Shift Keying ,意为正交相移键控，是一种数字调制方式。数字信号的四相相移键控调制与解调技术以其灵活性和通用性而得到广泛的应用，符合未来数字通信技术发展的方向。随着移动通信技术的发展，以前在数字通信系统中采用FSK、ASK、PSK等调制方式，逐渐被许多优秀的调制技术所替代。-QPSK modulation partial Quadrature Phase Shift Keying, Quadrature Phase Shift Keying means, is a digital modulation. Digital signal quadrature phase shift keying modulation and demodulation technology for its flexibility and versatility which has been widely used, in line with the future direction of development of digital communication technologies. With the development of mobile communication technology, previously used in digital communication systems FSK, ASK, PSK modulation, etc., many excellent modulation gradually being replaced by technology. Platform: |
Size: 1585152 |
Author:曾双奇 |
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Description: The phase of the output signal gets shifted depending upon the input. These are mainly of two types, namely Binary Phase Shift Keying (BPSK) and Quadrature Phase Shift Keying (QPSK), according to the number of phase shifts. The other one is Differential Phase Shift Keying (DPSK) which changes the phase according to the previous value. Platform: |
Size: 395264 |
Author:Khan17
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Description: a coherent optical receiver for demodulating optical quadrature phase-shift keying (QPSK) signals. ... Third, this scheme is applicable to multilevel modulation formats such as M-array PSK and quadrature amplitude modulation (QAM). First contribution tackles the complexity of the direct detection noncoherent receiver for differentially encoded quadrature phase shift keying. Platform: |
Size: 559104 |
Author:Khan17
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Description: Quadrature Amplitude Modulator (QAM) in digital communication system, generation of Quadrature Phase Shift Keyed (QPSK or 4-PSK) signal and demodulation. Introduction: The QAM principle: The QAM modulator. Platform: |
Size: 64512 |
Author:Khan17
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Description: 基于matlab的qpsk调制解调仿真，正交相移键控(Quadrature Phase Shift Keyin,QPSK)是一种数字调制方式。它分为绝对相移和相对相移两种。(Simulation and Simulation of QPSK modulation and demodulation based on MATLAB
Orthogonal phase shift keying is a digital modulation method. It is divided into two kinds: absolute phase shift and relative phase shift.) Platform: |
Size: 2048 |
Author:huluxldf |
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Description: Time Frequency Toolbox matlab时频分析工具箱,里面有各种时频分析函数，用matlab实现的，小波变换，Gabor变化，短时傅里叶变换等等(AF Ambiguity function
AR Auto-regressive (filter or model)
ASK Amplitude shift keyed signal
BJD Born-Jordan distribution
BPSK Binary phase shift keyed signal
BUD Butterworth distribution
CWD Choi-Williams distribution
FM Frequency modulation
FSK Frequency shift keyed signal
GRD Generalized rectangular distribution
HT Hough transform
MHD Margenau-Hill distribution
MHSD Margenau-Hill-Spectrogram distribution
MMCE Minimum mean cross-entropy
NAF Narrow-band ambiguity function
PMHD Pseudo Margenau-Hill distribution
PWVD Pseudo Wigner-Ville distribution
QPSK Quaternary phase shift keyed signal
RID Reduced interference distribution
STFT Short-time Fourier transform
TFR Time-frequency representation
WAF Wide-band ambiguity function
WVD Wigner-Ville distribution
ZAM Zhao-Atlas-Marks distribution) Platform: |
Size: 306176 |
Author:fisher86 |
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Search - QPSK matlab PHASE SHIFT