一种基于FSK和PSK的新型混合调制方法

A New Hybrid Modulation Method Base on FSK and PSK

针对数字通信领域现有的调制解调方法,提出一种基于FSK和PSK的新型混合调制方法。该方法在信号调制过程中,同时发生两个不同的序列a_n、b_n,利用数字脉冲幅度调制(PAM)变换成基带信号m(t)、n(t),然后分别对载波进行相位调制和频率调制,从而使已调信号的相位和频率分别具有m(t)和n(t)的信息,实现了相位与频率的混合调制。在信号解调过程中,通过对已调信号相位和频率的不同解调算法恢复出基带信号m(t)、n(t)。保证了在相同的频带宽度下,同时发送2个不同的序列,极大的提高了频带利用率。

As to the existing methods for the modulation and demodulation in the digital communication field, a new hybrid modulation method based on the frequency and phase is presented. In the signal modulation process, two different sequences a （t） ,b （t） are transmitted and then converted into the baseband signal re（t） ,n（t） using the PAM. The re（t） and n（t） is imparted to a carrier wave by varying its phase and frequency respectively, so that the modulated signals＇phase and frequency have the information of m（t） and n（t）. In the signal demodulation process,recover the baseband signal m（t） , n （t） through different demodulation algorithm for phase and frequency. The presented method greatly improving the bandwidth efficiency by sending two different sequences under the same bandwidth.