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Description: This is a model of a QPSK modulation system for transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC fi lters with excess bandwidth α = 0.18 are employed. The receiver includes an NDA timing recovery loop followed by a DD phase recovery loop. -This is a model of a QPSK modulation system f or transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC
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Size: 15826 |
Author: xiaoying |
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Description: 这个程序模拟了最大相位系统和最小相位系统，并分析其频谱-the simulation phase of the largest systems and minimum phase systems, and analyzing its spectrum
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Size: 1024 |
Author: byk518 |
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Description: This is a model of a QPSK modulation system for transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC fi lters with excess bandwidth α = 0.18 are employed. The receiver includes an NDA timing recovery loop followed by a DD phase recovery loop. -This is a model of a QPSK modulation system f or transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC
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Size: 15360 |
Author: xiaoying |
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Description: Blind Equalizer 的演算法主要是利用CMA及 LMS 的配合，当CMA将EYE打开，使讯号趋近于正确值，就切换到LMS，利用Slicer的输出当作training sequence来调整Equalizer的系数，而Carrier Recovery 的部份，则是将phase error track出来-Blind Equalizer algorithm is the use of the CMA and LMS tie, When the CMA will EYE open, signaling close to the correct value, it switched to the LMS. SLICER use of the output as training sequence to adjust Equalize The coefficient r, and some of Carrier Recovery, the type of track out phase error
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Size: 5120 |
Author: samyu107 |
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Description: 用于时钟恢复的全数字锁相环设计，可以去掉时钟的抖动。-Clock recovery for all-digital phase-locked loop design, the clock jitter can be removed.
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Size: 1024 |
Author: BrivaMa |
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Description: 2MHz的数据时钟恢复电路，包括鉴相器、分频器及滤波器-2MHz data clock recovery circuit, including phase detector, divider and filter
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Size: 2048 |
Author: Chen |
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Description: 通信系统中载波相位恢复所需要用到的程序，用了多种方法实现载波恢复。-Communications system carrier phase recovery procedures are needed, using a variety of methods to achieve carrier recovery.
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Size: 11264 |
Author: 包丹 |
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Description: 通信工程ＭＡＴＬＡＢ仿真
从Simulink的Sources中选择From Workspace，用鼠标将其拖到设计窗口中；
从Simulink的Sources中选择Sine Wave，用鼠标将其拖到设计窗口中；
从Simulink的Math中选择Product，用鼠标将其拖到设计窗口中；
从Simulink的Sinks中选择Scope，用鼠标将其拖到设计窗口中-Communication Engineering from the Simulink of MATLAB simulation Sources Select From Workspace, use the mouse to drag the design window
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Size: 8166400 |
Author: yangzhen |
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Description: 基于模糊逻辑控制的数字锁相环，用于通信系统中的载波恢复。Digital phase lock loop base on fuzzy logical control, which is used to recover carrier in communication system.-Based on fuzzy logic control of digital phase-locked loop for the communication system in carrier recovery. Digital phase lock loop base on fuzzy logical control, which is used to recover carrier in communication system.
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Size: 33792 |
Author: gogomx |
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Description: QPSK modulation system with recover loops-This is a model of a QPSK modulation system for transmission over a bandpass channel with fc = 100 Hz and B = 30 Hz and AWGN at the receiver. SRRC fi lters with excess bandwidth α = 0.18 are employed. The receiver includes an NDA timing recovery loop followed by a DD phase recovery loop. The transmitter?s symbol period is T and set to a value of 100 ms. The symbol period at the receiver is Tr. The model will produce six windows: Two constellation plots and two eye diagrams (for the real part only), at the output of the matched fi lters and after the recovery loops a plot of the phase error (output of the NCO) and a plot of the fractional timing error (used in the interpolator). The frequency off set at the receiver is denoted by deltaf. The model simulates the transmission of 8000 QPSK symbols.
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Size: 15360 |
Author: ranbowang |
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Description: 相位恢复算法，里面的滤波器用Matlab编写-phase recovery algorithm
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Size: 2048 |
Author: cao bin |
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Description: Recovery phase with recursive Costas loop. Bpsk symbols to demodulate
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Size: 1024 |
Author: kk |
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Description: 采用AFC技术来锁定频，采用Garden技术进行定时恢复，采用Costas环进行相位的锁定-Use technology to lock the frequency of AFC, using Garden timing recovery techniques using Costas loop for phase locking
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Size: 3072 |
Author: caomin |
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Description: A Costas loop is a phase-locked loop used for carrier phase recovery from suppressed-carrier modulation signals, such as from double-sideband suppressed carrier signals. It was invented by John P. Costas at General Electric in the 1950s. Its invention was described as having had "a profound effect on modern digital communications".
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Size: 66560 |
Author: dzemo |
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Description: A Costas loop is a phase-locked loop used for carrier phase recovery from suppressed-carrier modulation signals, such as from double-sideband suppressed carrier signals. It was invented by John P. Costas at General Electric in the 1950s. Its invention was described as having had "a profound effect on modern digital communications".
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Size: 40960 |
Author: dzemo |
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Description: 一篇基于似然函数的盲载波恢复的国外论文，值得一看-An EM Approach to Carrier Phase Recovery in AWGN Channel
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Size: 457728 |
Author: haodiangei |
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Description: 本论文详细了关于载波恢复的锁相环原理，可以借鉴下，讲的不错-Of this thesis in detail on the carrier recovery phase-locked loop principle, can learn from the next, talking about good
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Size: 207872 |
Author: aa |
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Description: 用二维快速傅立叶变化方法处理干涉图时，由于采样的数据序列长度必须是2的n次，故须将干涉图的数据范围圆形域延拓成矩形区域，文中提出了一种基于块重建算法的干涉图延拓的原理和方法，利用该方法对一幅实际干涉图进行了延拓，结果表明，该原理方法具有较高的处理精度，为波面相位复原奠定了基础。-Two-dimensional fast Fourier transform method for interferogram processing, due to the sampling of the data sequence length must be 2 n times, so the range of data required to interferogram Extension circular region into a rectangular area, the paper proposes a reconstruction based on block interferogram algorithm principles and methods of extension, the use of this method was a practical extension interferogram, the results show that the principle method has a high processing precision, the wavefront phase recovery basis.
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Size: 410624 |
Author: 张云 |
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Description: Thus PSK systems require less transmitted power for a given probability of
error than ASK or FSK systems.
Synchronous detection of PSK signals is required,due to the absense of a large
carrier component.Carrier recovery is there for emore complex and expensive.
DPSK systems are often a good compromise,offering simpler circuit ryata
small performance cost.The PSD of a PSK waveform is centered around!c,
and has an identical shape to that of the double side band modulating spectral
density
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Size: 28672 |
Author: lala |
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Description: 标准GS相位恢复算法，利用傅里叶变换与反变换进行逼近，直至收敛，误差下降算法。(Standard GS phase recovery algorithm, using Fourier transform and inverse transform approximation, until convergence, error reduction algorithm.)
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Size: 12288 |
Author: liuyan116 |
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