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Continuous phase modulation with 1-bit quantization and oversampling using iterative detection and decoding
EURASIP Journal on Wireless Communications and Networking ( IF 2.6 ) Pub Date : 2020-11-20 , DOI: 10.1186/s13638-020-01856-5
Rodrigo R. M. de Alencar , Lukas T. N. Landau , Rodrigo C. de Lamare

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.



中文翻译:

使用迭代检测和解码的1位量化和过采样的连续相位调制

考虑具有连续相位调制的通道和具有过采样的1位ADC。由于过采样,高阶调制会产生更高的可实现速率,本研究提出了使用复杂的信道编码来解决此问题的方法。考虑了迭代检测和解码,其利用了从过采样的CPM序列中提取的软信息。除了基于常规信道编码技术的策略之外,还提出了定制的位映射,其中可以在高SNR下可靠地检测到两个位,而只有第三个位受粗量化的不确定性影响。这样,卷积码仅应用于第三位。我们在Turbo接收机上进行的实验表明,迭代检测和解码是一种利用过采样带来的附加信息的有前途的方法。此外,示出了与常规信道编码的情况相比,基于定制的比特映射的所提出的方法对应于较低的误码率。

更新日期:2020-11-21
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