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空间预滤波加无约束自适应噪声抵消器构成了一种主瓣约束的自适应旁瓣抵消器。这种自适应旁瓣抵消器由于实现了保持主瓣方向以及主瓣形状的导数约束，具有较好的主瓣保持性能，且结构简单，便于工程实现。本文在原有理论研究的基础上，着重从实验方面研究这种自适应旁瓣抵消器的主瓣保持和旁瓣抵消性能。设计并构造了一个实验系统，该系统利用一种新的空间预滤波结构，使其更宜于工程实现。进行了水池和海上试验，详细考察了输入信噪比、信号干扰比、信号与干扰带宽和自适应步长因子等参数对系统性能的影响。取得的结果证实了理论分析的正确性。
Spatial prefiltering and unconstrained adaptive noise canceller constitute a mainlobe constraint adaptive sidelobe canceller. This adaptive sidelobe canceller has good mainlobe holding performance due to the realization of the mainlobe direction and the derivative constraint of the mainlobe shape, and has a simple structure and is convenient for engineering implementation. Based on the original theoretical research, this paper focuses on experimentally studying the mainlobe hold and sidelobe cancellation performance of this adaptive sidelobe canceller. An experimental system is designed and constructed. The system uses a new spatial pre-filtering structure to make it more suitable for engineering implementation. A series of experiments were carried out at the basin and at sea. The effects of input signal to noise ratio, signal to interference ratio, signal to interference bandwidth and adaptive step factor on system performance were investigated in detail. The results obtained confirm the correctness of the theoretical analysis.