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[Communication] 8psk DL : 0: （1）分析QPSK调制、解调原理，并画出其系统框图；（2）产生等概率且相互独立的二进制序列，作为待传输的信号，并画出其波形；（3）进行8PSK调制，分别画出I、Q两支路信号经过乘法器后的波形以及8PSK调制波形；（4）产生均值为0，方差为1的加性高斯随机噪声，画出其时域波形及频谱；（5）将加性高斯随机噪声作为传输信道的干扰，画出接收端信号的时域图；（6）进行8PSK解调，输出解码序列，画出解调后信号波形；（7）计算系统信噪比、传输误码率。-(1) analysis of QPSK modulation, demodulation, and draw the system block diagram (2) have equal probability and independent binary sequence as a signal to be transmitted, and draw the waveform and (3) 8PSK modulation, Draw the I, Q two way signal multiplier waveform and 8PSK modulation waveform (4) to produce zero mean and variance of an additive Gaussian random noise, to draw the time-domain waveform and spectrum ( 5) the additive Gaussian random noise interference as a transmission channel, to draw the time-domain diagram of the receiver signal (6) 8PSK demodulator output decoding sequence, draw the demodulation of the signal waveform computing system (7) signal-to-noise ratio, the transmission bit error rate.
Date : 2025-12-17 Size : 2kb User : 张涛
[Communication] festimate1q1023 DL : 0: 平方倍频法，估计直接序列扩频qpsk信号载频,功率谱估计法采用平均周期图法-Square multiplier method, the estimated direct sequence spread spectrum qpsk signal carrier frequency, power spectrum estimation method using the average periodogram
Date : 2025-12-17 Size : 1kb User : 李科