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激光多普勒测速是当代流速测量技术中最具有实用价值和得到广泛应用的技术。多普勒信号处理器在整套测速系统中起着十分关键的作用。为赶超国际先进水平，本文作者独立研制开发出一种新型信号处理器。该处理器采用数字相关原理，对每个多普勒波群直接完成波群检测和自相关处理，得到其频率值。处理器与微机组成一体，各种参数的设置和控制全部采用软件。实测和应用表明，该信号处理器具有抗噪声能力强、功能完善、结构紧凑、成本低等优点，为实现智能化的信号处理和数据处理结合的激光测速系统创造了条件。
Laser Doppler velocimetry is the most practical and widely used technique in contemporary flow velocity measurement. Doppler signal processors play a crucial role in the overall speed measurement system. To catch up with the international advanced level, the author independently developed a new type of signal processor. The processor uses the digital correlation principle to directly perform wave group detection and auto-correlation processing on each Doppler wave group to obtain its frequency value. The processor and the computer form an integral whole, the various parameter establishment and the control all uses the software. The measurement and application show that the signal processor has the advantages of strong anti-noise ability, perfect function, compact structure and low cost, which has created the conditions for the realization of a laser speed measuring system combining intelligent signal processing and data processing.