Optimization of Delayed Bit-interleaved Coded Modulation in the High-SNR Regime
Jayarathne, Harindu; Marasinghe, Dileepa; Rajatheva, Nandana; Latva-aho, Matti (2024-09-20)
IEEE
20.09.2024
H. Jayarathne, D. Marasinghe, N. Rajatheva and M. Latva-Aho, "Optimization of Delayed Bit-Interleaved Coded Modulation in the High-SNR Regime," in IEEE Communications Letters, vol. 28, no. 11, pp. 2588-2592, Nov. 2024, doi: 10.1109/LCOMM.2024.3464873.
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© 2024 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.
https://creativecommons.org/licenses/by/4.0/
© 2024 The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.
https://creativecommons.org/licenses/by/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202409266070
https://urn.fi/URN:NBN:fi:oulu-202409266070
Tiivistelmä
Abstract
In this letter, we investigate the capacity of delay schemes in delayed bit-interleaved coded modulation (DBICM) at high signal-to-noise ratios (SNR) using alternative methods to numerical integration. A closed-form formula is derived to approximate the DBICM capacity at high SNR. For Gray codes, DBICM capacity is proven as asymptotically optimal irrespective of the delay scheme and we further characterize the minute variations in finite SNR values. Compared to BICM using the binary reflected Gray Code, an improvement of 0.1 dB in the BER performance is achieved using a non-Gray bit-labeling combined with its optimized DBICM delay scheme.
In this letter, we investigate the capacity of delay schemes in delayed bit-interleaved coded modulation (DBICM) at high signal-to-noise ratios (SNR) using alternative methods to numerical integration. A closed-form formula is derived to approximate the DBICM capacity at high SNR. For Gray codes, DBICM capacity is proven as asymptotically optimal irrespective of the delay scheme and we further characterize the minute variations in finite SNR values. Compared to BICM using the binary reflected Gray Code, an improvement of 0.1 dB in the BER performance is achieved using a non-Gray bit-labeling combined with its optimized DBICM delay scheme.
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