Layered coding for satellite‐plus‐terrestrial multipath correlated fading channels

Abstract

SUMMARYThis paper introduces two alternative layered-coding (LC) structures suitable for a combination of a geostationary (GEO) satellite and a terrestrial system providing multicasting multimedia services. Both schemes include a RAKE receiver and their performance results are presented under realistic satellite and terrestrial channel conditions. The structures are based on mapping the coded bits either onto 8-PSK symbols or onto QPSK symbols. The LC parameters (such as the interleaver design and the convolutional encoder structures) are analysed and their effect on performance is quantified, especially in cases of highly correlated channels (low vehicular speeds). The various impairments that are associated to the transmission through both terrestrial and satellite correlated fading channels will be taken into account and link level performance results as well as a complexity discussion will be presented.

Evaluation of Cooperative Techniques for Hybrid/Integrated Satellite Systems

“…The penalty associated with the latter choice is increased decoding complexity and delay. As an example of the layered coding applied to hybrid/integrated satellite system to provide MBMS, the previous research in [9] proposed a layered coding scheme with serially concatenated turbo codes, and demonstrated performance improvement. In this scheme, a receiver in the deep fading condition selects a decoding scheme for the fully concatenated codes, so that it can produce a large coding gain, while a receiver in the mild channel condition selects a decoding scheme for a simple outer code only and, thus, reduces the decoder complexity.…”

S‐UMTS access network for broadcast and multicast service delivery: the SATIN approach

“…Comparing the layered coding structures, it has been shown that Structure B leads to better coverage efficiency due to its improved BER performance [8]. Structure A has worse performance than Structure B, but, due to its higher spectral efficiency, it can accommodate twice the throughput of Structure B.…”