Phase Noise Measurement for Improving the Performance of High-Order Modulation Scheme Wireless Links

Phase noise is a critical parameter that affects the performance of communication receivers, especially in high-speed and high-frequency systems. This paper presents a novel approach to measure phase noise, which aims to improve the performance of receivers. Conventional methods often suffer from limitations, such as the need for a high-quality reference, sensitivity to environmental conditions, and inaccuracies in signal degradation due to the dynamic range of a logarithmic detector. Our proposed method utilizes the delay line method and advanced signal processing techniques to eliminate these problems. By integrating calibration algorithms and eliminating the need for a reference signal, we achieve more accurate and reliable phase noise measurements. Thus makes the method attractive for the characterization of modern oscillators, amplifiers with low phase noise and receivers with high-order modulation schemes whose phase noise performance is better than that of standard references. With the increased sensitivity of the dual-channel cross-correlation technique these refined measurements can be used to optimize receiver designs, leading to significant improvements in signal detection, demodulation and overal system efficiency. Experimental results confirm the effectiveness of the proposed photonic delay phase noise meter approach This research contributes to the advancement of phase noise characterization techniques and we believe it will provide practical insights to improve the robustness and reliability of communication systems in real-world environments.