Unequal Error Protection with LDM in inside carriage wireless communications

Intravehicular wireless systems are attracting a lot of research interest during the last years. A future scenario where intravehicular wired systems will be replaced by wireless systems will allow to reduce cabling weight and increase the flexibility. But one of the main requirements of wireless systems is to maintain the same reliability level as the wired ones. A system based on LDM (Layered Division Multiplexing) complemented with Unequal Error Protection (UEP) is proposed in this article to guarantee the reliability level of a wireless system where two types of data, critical and non critical, need to be transmitted over the same physical layer. To prove that the proposed method is more reliable than the traditional TDM/FDM systems, BER and throughput simulations have been carried out. Simulations show that exploiting the extra available time obtained with LDM using an appropriate coding, BER of the critical data is reduced several orders and throughput of the non critical data could be higher than the TDM system.