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Article Dans Une Revue IEEE Wireless Communications Letters Année : 2021

On Nested Property of Root-LDPC Codes

Résumé

We investigate on binary Protograph Root-LDPC codes that can embed an interesting property, called nested property. This property refers to the ability for a coding scheme to achieve full diversity and equal coding gain for any number of received coded blocks and for any configuration of the received code blocks. One can take advantage of this property for “carousel”-type transmissions broadcasting cyclically coded information. For regular Root-LDPC codes, we show that these codes inherently have both properties over the nonergodic block fading channel and when message passing decoding is used. Then, we show that irregular Root-LDPC structures could not provide equal coding gain except if explicit design rules are enforced to ensure that the nested property is fulfilled when designing irregular Root-LDPC codes. Simulation results show that designed nested Root-LDPC codes achieve good performance and full diversity for coding rates R = 1/2, R = 1/3 and R = 1/4.
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Dates et versions

hal-03245925 , version 1 (02-06-2021)

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Lorenzo Ortega Espluga, Charly Poulliat. On Nested Property of Root-LDPC Codes. IEEE Wireless Communications Letters, 2021, 10 (5), pp.1005-1009. ⟨10.1109/LWC.2021.3054414⟩. ⟨hal-03245925⟩
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