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QPSK是英文Quadrature Phase Shift Keying的缩略语简称,意为正交相移键控,是一种数字调制方式。在19世纪80年代初期,人们选用恒定包络数字调制。这类数字调制技术的优点是已调信号具有相对窄的功率谱和对放大设备没有线性要求,不足之处是其频谱利用率低于线性调制技术。19世纪80年代中期以后,四相绝对移相键控(QPSK)技术以其抗干扰性能强、误码性能好、频谱利用率高等优点,广泛应用于数字微波通信系统、数字卫星通信系统、宽带接入、移动通信及有线电视系统之中......理解QP
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.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 m
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hilditch.m是hilditch细化算法。
RC_unwrap.m是逐行逐列去包裹算法。
least_unwrap.m是最小二乘去包裹算法。
FTP.m是利用傅里叶变换提取相位。
sincosfilter.m是正余弦滤波算法。
以上算法在相位图的相关计算中常用到,比如电子散斑干涉、全息干涉、相移技术等。-hilditch.m is hilditch refinement algorithm. RC_unwrap.m is listed line by line u
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Phase Based Template Matching: Phase information is used for matching the input imagery with the template. Both the images are filtered with canny edge detector. The timing efficiency is introduced by implementing skipping steps while doing correlati
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4-Dipole Array Simulations
demonstrates the pattern of an array of 4 elements, pointing in the z direction and placed along the x axis with equal spacing d=0.5 wavelength. The program has also shown the pattern of the array as the progressive phase
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实现了频移键控 相移键控 幅度键控等多种数字调制的matlab仿真-The realization of the FSK keying phase shift keying, such as rate of a wide range of digital modulation matlab simulation
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四进制差分相移键控(键控调制方法),樊昌信《通信原理》内容-Four M-ary differential phase shift keying (keying modulation method), Fan Changxin " Communication Theory" content
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四进制相移键控,樊昌信《通信原理》内容-Quaternary phase shift keying, Fan Changxin " Communication Theory" content
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光纤光栅 布拉格光纤光栅 长周期光纤光栅 相移布拉格光纤光栅 切趾布拉格光纤光栅 取样布拉格光纤光栅-Fiber Bragg Grating FBG long-period fiber grating phase-shift FBG Fiber Bragg Grating apodization sampling Fiber Bragg Gratings
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OQPSK Demodulation Project in Matlab.
OQPSK means offset quadrature phase shift keying. an important modulation scheme in IEEE 802.15.4
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Matlab code for BER in binary phase shift keying
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qpsk matlab simulink receiver and transmitter.
Quadrature Phase shift keying
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Matlab file for simulating a cyclic-prefix (CP) orthogonal-frequency-
division-multiplexing (OFDM) system with binary phase-shift keying (BPSK)
modulation on each subcarrier. CP-OFDM system includes a repetition code
and interleaving across
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相移光栅matlab仿真程序,方便学习光栅特性-Phase-shift grating matlab simulation program to facilitate the learning Grating
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we can obtain the symbol error rate of space time block code using the modulation technique of Quadrature-Phase shift keying
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【摘要】采用’()*(+ 通信仿真软件对应用于无线信道中的,-./,0-./,01(’ 的数字通
信方式和主要通信过程的实际情况进行计算机模拟仿真。主要通信过程为抽样、量化、编码、调制解
调、纠错编码等,并给出了几种调制解调的主要特性,为建立实际通信系统提供了基本的依据。
【关键词】移相键控(-./);正交幅度调制(1(’);脉码调制(-2’)-【Abstract】 ()*(+ communication simulation software used in wireless ch
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bpsk-binary phse shift keying,fsk-frequency shift keying,hamming code,pcm-pulse coded modulation,dpsk-differential phase shift keying
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现代通信原理课程中,在MATLAB中实现二进制相移键控调制程序。-Modern communication theory course, to implement in MATLAB binary phase shift keying modulation program.
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能够实现MATLAB下相位偏移算法,里面自带一些音频-It is able to achieve a phase shift algorithm in MATLAB, which comes with some audio
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利用MATLAB集成环境下的M文件,编写程序来实现MSK的调制解调,并绘制出解调前后的时域和频域波形及叠加噪声时解调前后的时频波形,根据运行结果和波形来分析该解调过程的正确性及信道对信号传输的影响。通过这次课程设计进一步加深了我对最小二进制相移键控(MSK)调制解调性能的理解与掌握,同时将课堂上学到的理论知识用于实践。增强了我在模拟仿真方面的能力,为以后系统开发和通信系统仿真打下了良好的基础。(The use of MATLAB in the integrated environment of
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