qpsk modulation with carrier and timing recovery loops

调制越高阶,那么对无线信道的质量要求就越高,qpsk只是调相,16qam开始

"001","010","011","100","101","110"和"111";星座图如下:qpsk的应用

图8 qpsk 解调后星座图

图3-9 qpsk调制之后的星座图