RT Journal Article
T1 Turbo joint source-channel coding of non-uniform memoryless sources in the bandwidth-limited regime
A1 Ochoa, Idoia
A1 Crespo, Pedro
A1 Ser, Javier Del
A1 Hernaez, Mikel
AB This letter proposes a novel one-layer coding/ shaping scheme with single-level codes and sigma-mapping for the bandwidth-limited regime. Specifically, we consider nonuniform memoryless sources sent over AWGN channels. At the transmitter, binary data are encoded by a Turbo code composed of two identical RSC (Recursive Systematic Convolutional) encoders. The encoded bits are randomly interleaved and modulated before entering the sigma-mapper. The modulation employed in this system follows the unequal energy allocation scheme first introduced in [1]. The receiver consists of an iterative demapping/decoding algorithm, which incorporates the a priori probabilities of the source symbols. To the authors knowledge, work in this area has only been done for the power-limited regime. In particular, the authors in [2] proposed a scheme based on a Turbo code with RSC encoders and unequal energy allocation. Therefore, it is reasonable to compare the performance with respect to the Shannon limit of our proposed bandwidthlimited regime scheme with this former power-limited regime scheme. Simulation results show that our performance is as good or slightly better than that of the system in [2].
SN 1089-7798
YR 2010
FD 2010-04
LK https://hdl.handle.net/11556/3151
UL https://hdl.handle.net/11556/3151
LA eng
NO Ochoa , I , Crespo , P , Ser , J D & Hernaez , M 2010 , ' Turbo joint source-channel coding of non-uniform memoryless sources in the bandwidth-limited regime ' , IEEE Communications Letters , vol. 14 , no. 4 , 5439357 , pp. 336-338 . https://doi.org/10.1109/LCOMM.2010.04.092462
NO ACKNOWLEDGMENT This work was supported in part by the Spanish Ministry of Science and Innovation through the CONSOLIDER-INGENIO 2010 programme (CSD200800010, www.comonsens.org).
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