A new implementation algorithm for multiplexing and channel coding scheme in W-CDMA

Multiplexing and channel coding is of great importance in W-CDMA. It provides a data passageway from MAC (medium access control) layer to physical layer to ensure the efficient and reliable transmission of data streams. The channel coding scheme is a combination of error detection, error collecting and rate matching, interleaving and transport channel mapping on to/splitting from physical channels. In this paper, the scheme of multiplexing and channel coding in W-CDMA is introduced and its advantages and disadvantages are discussed. After analyzing the performance of the direct implementation algorithm of this scheme, including its operational complexity, memory requirement and process delay, a new algorithm is put forward by simplification of the scheme. The new algorithm is shown to be much more efficient than the direct one.