Rehits

Rehits are a phenomenon observed in certain communication systems, particularly in older or less sophisticated wireless networks. The term refers to a situation where a signal, after being transmitted, reflects off an object and then travels back to the receiver. This reflected signal arrives at the receiver later than the direct signal, or sometimes even instead of it, depending on the environment and the object's position.

These reflections are a form of multipath propagation, where a signal takes multiple paths from the transmitter to the receiver. The "rehit" specifically refers to the delayed arrival of a signal due to reflection. In some cases, these rehits can cause interference, distorting the original signal and making it harder for the receiver to decode the intended information. This is because the receiver may interpret the delayed reflected signal as a new, separate transmission, leading to confusion.

The impact of rehits can vary significantly. In simple systems, they might lead to minor signal degradation. However, in more complex systems that rely on precise timing, such as some forms of radar or high-speed data communication, significant rehits can cause outright signal failure or severe performance issues. Techniques like equalization are often employed in modern communication systems to mitigate the negative effects of multipath propagation, including rehits, by compensating for the delayed and altered signal components. Understanding and managing rehits is crucial for designing robust and reliable communication infrastructure.