PDMA

Pattern-Division Multiple Access (PDMA) represents an advanced communication technology that allows multiple users to share a common frequency band. It achieves this by assigning unique spreading codes to each user, thus preventing interference between signals. In PDMA, the entire frequency spectrum is available to each user, but each user's signal is spread over the wide frequency band according to a unique pattern determined by the user's code. This code acts as an identifier for the specific user, allowing the receiver to distinguish between different users even when their signals overlap in frequency and time. This method of signal spreading reduces the likelihood of interference and allows for more efficient use of the available frequency band. It also provides a degree of privacy, as the user's signal can only be received by a receiver that knows the user's unique code. PDMA can be used in 5G scenarios like eMBB, URLLC and mMTC, enhancing spectrum efficiency, increasing connections and decreasing latency.