为了解决连续相位频移键控(continuous phase frequency shift keying,CPFSK)信号在长时延扩展信道下的均衡难题,利用单载波频域均衡的思想提出了在最小均方误差准则下最优的CPFSK频域均衡算法,包括线性均衡和非线性的判决反馈均衡。从理论上分析了算法的原理和可实现性,并且以两种CPFSK信号为例,通过数值仿真验证了算法的理论结果。仿真结果表明:该文提出的线性频域均衡算法性能要好于传统的CPFSK信号频域均衡算法,与传统频域均衡算法相比,几乎没有增加计算复杂度;并且利用判决反馈算法逼近了最大似然序列估计的性能。 In order to solve the problem of the continuous phase frequency shift keying (CPFSK) signal equalization under the long delay channel, this paper proposes the optimal CPFSK with the minimum mean square error criterion Frequency domain equalization algorithm, including linear and nonlinear decision feedback equalization. The principle and feasibility of the algorithm are theoretically analyzed. Taking the two CPFSK signals as an example, the theoretical results of the algorithm are verified by numerical simulation. The simulation results show that the performance of the linear frequency domain equalization algorithm proposed in this paper is better than the traditional frequency domain equalization algorithm of CPFSK signal, and almost does not increase the computational complexity compared with the traditional frequency domain equalization algorithm; and the decision feedback algorithm approximates the maximum likelihood However, the performance of sequence estimation.