In this letter, we extend the conventional (finite-field based) channel-coded wireless physical layer network coding (WNC) into a more general setup based on the algebraic rings. The key idea is to enable a joint WNC-...
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In this letter, we extend the conventional (finite-field based) channel-coded wireless physical layer network coding (WNC) into a more general setup based on the algebraic rings. The key idea is to enable a joint WNC-channelcoding over an appropriate algebraic structure, which then in turn allows to employ some advanced WNC functions (e.g., modulo-sum with superior performance) jointly with nonbinary channel coding at the relaying nodes in the network. We justify the suitability of ring structures for coded WNC systems, and show that a particular solution with modulo-sum WNC function can significantly outperform the conventional (finite-field based) implementation. In addition, we compare the achieved performance of the proposed (coded WNC) processing with several practical and information-theoretical benchmarks to substantiate its performance gains.
Parallel combinatory multicarrier (PCMC) modulation is a generalisation of the legacy multicarrier frequency shift keying (FSK) scheme, where for each group of M subcarriers, more than one (say L) subcarriers are chos...
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Parallel combinatory multicarrier (PCMC) modulation is a generalisation of the legacy multicarrier frequency shift keying (FSK) scheme, where for each group of M subcarriers, more than one (say L) subcarriers are chosen for simultaneous transmission. The PCMC scheme provides an effective way to increase the spectral efficiency while maintaining non-coherent detection at the receiver. This study provides an in-depth study of the PCMC scheme with emphasis on how to couple with binary or non-binary channelcoding. One favourable system configuration is identified, having parameters (L,M)=(4,8), which increases the spectral efficiency by 50% relative to the most efficient FSK scheme from the FSK family. Coupled with non-binary low-density parity-check (LDPC) coding over the Galois field GF(64), the PCMC scheme with (L,M)=(4,8) is shown to have robust performance in multipath fading channels.
In this paper, we discuss the combination of non-binary channelcoding with higher-order modulation and MIMO transmission in the form of spatial multiplexing. In addition to the benefits of non-binary LDPC codes on th...
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ISBN:
(纸本)9781424456383
In this paper, we discuss the combination of non-binary channelcoding with higher-order modulation and MIMO transmission in the form of spatial multiplexing. In addition to the benefits of non-binary LDPC codes on the AWGN channel, we identify an inherent advantage for non-binary coding in multiple antenna schemes. By comparing binary and q-ary information processing at the receiver, we highlight the intrinsic advantages of non-binary coding. A performance comparison based on simulation results shows that, at similar system complexity, non-binary information processing can actually outperform the Shannon limit of its binary counterpart.
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