Continuous phase modulation with 1-bit quantization and oversampling using iterative detection and decoding

Autor(es)

de Alencar, Rodrigo R. M. ^[1] ; Landau, Lukas T. N. ^[1] ; de Lamare, Rodrigo C. ^[1]

Afiliação do(s) autor(es)

^[1] Pontificia Univ Catolica Rio de Janeiro, Ctr Estudos Telecomunicacoes, BR-22453900 Rio De Janeiro - Brazil

• Tipo de documento: Artigo Científico
• Fonte: EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING; v. 2020, n. 1 DEC 20 2020.
• Citações Web of Science: 0

Resumo

A channel with continuous phase modulation and 1-bit ADC with oversampling is considered. Due to oversampling, higher-order modulations yield a higher achievable rate and this study presents methods to approach this with sophisticated channel coding. Iterative detection and decoding is considered, which exploits the soft information extracted from oversampled CPM sequences. Besides the strategy based on conventional channel coding techniques, a tailored bit mapping is proposed where two bits can be detected reliably at high SNR and only the third bit is affected by the uncertainties from the coarse quantization. With this, a convolutional code is only applied to the third bit. Our experiments with a turbo receiver show that the iterative detection and decoding is a promising approach for exploiting the additional information brought by oversampling. Moreover, it is shown that the proposed method based on the tailored bit mapping corresponds to a lower bit error rate in comparison with the case of conventional channel coding. (AU)

• Processo FAPESP: 15/24499-0 - Redes de comunicações sem fio de 5ª geração e emprego de nuvens: novos conceitos, algoritmos e aplicações
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