QPSK技术具有抗干扰性能强、误码性能好、频谱利用率高等优点,目前广泛应用于数字通信、数字视频广播、数字卫星广播等领域 详细介绍了QPSK技术的工作原理、性能以及使用调相法和相位选择法产生QPSK信号的电路方框图及特点。-QPSK technology has strong anti-interference performance, BER performance and spectral efficiency advantages, at present widely used in digital communications, digital video broadcasting, digital satellite broadcasting and other areas described in detail QPSK technology works, performance and the use of phase modulation method and phase selection have a QPSK signal and characteristics of the circuit block diagram.