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基于MATLAB的QPSK信号调制技术及其频谱分析

QPSK意为正交相移键控，是一种数字调制方式在电路上实现较为简单。它不仅可以节约频谱资源而且可以提供良好的通信性能。QPSK调制是一种具有较高频带利用率和良好的抗噪声性能的调制方式，在数字移动通信中已经得到了广泛的应用。 本次设计在理解QPSK调制 ...
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基于MATLAB的QPSK信号调制技术及其频谱分析

5.1理想信道下基本QPSK仿真系统 在理解了QPSK调制解调的原理下，利用上面介绍的matlab软件构建1.一个理想信道下基本QPSK仿真系统,仿真结果包括a.基带输入波形及其功率谱 ；b.QPSK信号及其功率谱；c.QPSK信号星座图 从上图可以看出，QPSK信号在理想信道上的调制 ...
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Modulation roundup: error rates, noise, and capacity

Subscribe here to receive similar articles over e-mail whenever Krishna Pillai publishes an article on his site. The article compares various digital modulation schemes like BPSK, QPSK, PAM, 16PSK, ...
EDN

Complex modulation comes to optical fiber

The demand for greater data throughput seems endless, and it is accelerating faster than many people expected, creating bottlenecks in fiber-optics networks. Digital transmissions of 100 Gbps, which ...