System Design and Advanced Receiver Techniques for MBMS Broadcast Services

Raptor codes have been recently standardized by 3GPP to be used in the application layer. These codes are very efficient and perform sufficiently close to the so-called ideal fountain code on the block-erasure channel. However, for real applications, a simple receiver enhancement called permeable layer receiver can be done, which provides huge performance gains. Standard Raptor decoding algorithms have to be revised and new efficient decoding algorithms need to be introduced. In this work we present a practical and efficient implementation of the Raptor decoder for permeable layer receiver. We show that, not only we achieve huge performance gains, but we achieve them at an affordable (low) decoding complexity. Complexity and decoding performance simulation results are presented for the download delivery and video broadcasting.