Continuous wave telemetry is one of the critical downhole-to-surface transmission techniques of downhole information for logging while drilling (LWD). This paper aims to present a highly effective modulation technique for a continuous wave telemetry called Continuous Phase-Frequency Keying (CPFK) and an adaptive coherent detection method for the CPFK signal. The modulation equation of the CPFK signal is established according to the acceleration/deceleration time of the motor in a continuous wave generator, the coherent detection method is given for the demodulation of CPFK signal, and then the adaptive mud pump noise cancellation algorithm is proposed for identifying CPFK signals based on probability analysis and PSO (Particle Swarm Optimization) algorithm. The results of simulation analysis show that the proposed CPFK modulation mode is feasible and the adaptive mud pump noise cancellation algorithm can realize the demodulation and decoding of CPFK signals. It has been found from the analysis that pump noise is the main noise affecting the demodulation of CPFK signals, accurate removal of pump noise can effectively improve the frequency band utilization of CPFK signal and reduce the bit error probability of the adaptive mud pump noise cancellation algorithm.

连续波遥测是随钻测井（LWD）井下信息的关键井下传输技术之一。本文旨在提出一种称为连续相频键控 (CPFK) 的连续波遥测的高效调制技术和 CPFK 信号的自适应相干检测方法。根据连续波发生器中电机的加减速时间建立CPFK信号的调制方程，给出CPFK信号解调的相干检测方法，然后提出自适应泥浆泵噪声消除算法。基于概率分析和 PSO（粒子群优化）算法识别 CPFK 信号。仿真分析结果表明，提出的CPFK调制方式是可行的，自适应泥浆泵噪声消除算法可以实现CPFK信号的解调和解码。分析发现泵噪声是影响CPFK信号解调的主要噪声，准确去除泵噪声可以有效提高CPFK信号的频带利用率，降低自适应泥浆泵噪声消除算法的误码率.