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摘　要:根据HFC网络上行信道的特性,建立了信道模型 分析了上行信道中存在的各种噪声对QPSK 调制技术的影响。结果表明在C /N (传输信道载噪比)较低的情况下,采用QPSK调制方式,可以提高系 统的抗干扰能力。 关键词: QPSK 光纤同轴电缆混合网 上行信道 噪声(Abstract: HFC network in accordance with the characteristics of the uplink channel, the establishment of a channel model an analysis of the various uplink channel noise on the impact of QPSK modulation. The results show that the C/N (transmission channel carrier-to-noise ratio) lower, the use of QPSK modulation, can improve the system of anti-interference ability. Keywords: QPSK hybrid fiber coaxial cable network uplink channel noise)

MODULATOR This function modulate the forward Channel chips. Block Diagram InChips -> [Walsh] -> [Spreading] -> [Output Tx Shaping Filter] Inputs: chips - chips sequence to transmit MFType - Shaping Filter type (default - Rise Cosine) Walsh - Used row of Walsh matrix Outputs: TxOut - Transmitted signal (analog signal) PN - PN sequence for I/Q Channels MF - mathed filter taps (Shaping Filter)

bpsk modulation matlab code

说明：  实现数据误差的剔除、修正，曲线拟合，平缓。(Eliminate data errors, correction, curve fitting, flat.)

solution to nonlinear equations useing newton methode

matlab图像处理程序，很实用的，图像多分辨率金字塔(matlab image processing procedures, very practical, multi-resolution image pyramid)

说明：  用较少的FFT点数获得对频率的精细分析，减小计算量，达到较高的分辨率(Fine analysis of spectrum)

这是一个微分进化算法的实例。有兴趣可以看看。。。。(ED)

This file include the pdf, matlab codes and simulation model of the sine_pwm_inverter This is small project and being implemented to learn the matlab simulink modelling so kindly refer for your exercise regards

good paper ieee for simulink in matlab