Direction finding is a research area in signal processing and communication systems that focuses on determining the direction from which a signal is transmitted or received. This technique is commonly used in radar, sonar, wireless communication systems, and radio frequency identification (RFID) systems to locate the source of a signal. Direction finding algorithms often involve using multiple antennas or antenna arrays to measure the phase and amplitude differences of the incoming signals, allowing for the estimation of the signal's arrival direction. This information can be crucial for applications such as tracking moving objects, locating targets, or optimizing wireless communication links.