http://javad.dev/tags/edgeai/Recent content in Edgeai on Javad Rajabzadeh | Senior Software EngineerHugoen-usSun, 19 Jul 2026 22:00:00 +0330http://javad.dev/posts/rankn-multichannel-wiener-filter/Sun, 19 Jul 2026 22:00:00 +0330http://javad.dev/posts/rankn-multichannel-wiener-filter/<p>In real-world acoustic engineering—especially on <strong>drones, autonomous robotic platforms, and ultra-low-power edge processors</strong>—enhancing speech signals in real time presents a severe computational bottleneck. Microphones mounted on moving drones or robotic units encounter heavy spatial interference, rotor harmonics, and turbulent wind noise.</p> <p>While classical Multi-channel Wiener Filters (MWF) offer optimal spatial noise reduction, computing full spatial matrix inversions $\mathbf{R}_{nn}^{-1}(f)$ across hundreds of STFT frequency bins imposes an $\mathcal{O}(M^3)$ computational load that degrades battery life and causes latency spikes on embedded microcontrollers (such as STM32, ESP32, or ARM Cortex-M flight controllers).</p>