Eigenvalue Decomposition Precoded Faster-Than-Nyquist Transmission of Index Modulated Symbols

Chaki, Prakash; Ishihara, Takumi; Sugiura, Shinya

doi:10.1109/isit45174.2021.9518263

Cited by 6 publications

(3 citation statements)

References 25 publications

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“…Instead of handling ISI at the receiver side as done in the above papers, one can mitigate ISI due to FTN at the transmitter side via precoding [16]. Similar to [16], the papers [17] and [18] suggest eigen-decomposition based precoding for FTN signaling, respectively for index modulation and for frequency selective channels.…”

Section: A Other Related Workmentioning

confidence: 99%

Faster-than-Nyquist Signaling for MIMO Communications

Zhang¹,

Yüksel²,

Yanıkömeroğlu³

2021

Preprint

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Faster-than-Nyquist (FTN) signaling is a non-orthogonal transmission technique, which has the potential to provide significant spectral efficiency improvement. This paper studies the capacity of FTN signaling for point-to-point single-input single-output (SISO) and multiple-input multiple-output (MIMO) channels. Although the capacity of SISO FTN was studied previously, due to some incomplete prerequisites, the exact capacity expression was not found. In this paper we resolve these issues for SISO FTN and generalize the result to MIMO FTN. We show that joint waterfilling in time and space is capacity achieving for MIMO FTN.

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Section: A Other Related Workmentioning

confidence: 99%

Faster-than-Nyquist Signaling for MIMO Communications

Zhang¹,

Yüksel²,

Yanıkömeroğlu³

2021

Preprint

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“…Also, a joint channel estimation and equalization technique was developed for SEFDM-SIM [23]. Furthermore, the time-domain counterpart of SEFDM-SIM was independently developed as FTN-IM [24], [25], [26]. To the best of our knowledge, the conventional SEFDM-SIM scheme has not been investigated with any sophisticated precoding or power allocation, based on our review of the existing literature.…”

Section: Introductionmentioning

confidence: 99%

Precoded Filterbank Multicarrier Index Modulation With Non-Orthogonal Subcarrier Spacing

Chaki

Ishihara

Sugiura

2023

IEEE Trans. Commun.

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In this paper, we propose a novel precoded nonorthogonal frequency division multiplexing (NOFDM) with subcarrier index modulation (SIM) to increase spectral efficiency for multicarrier systems. The proposed NOFDM-SIM scheme is constituted by a filterbank multicarrier system under reduced subcarrier spacing, where precoded index modulated symbols are mapped onto the subcarriers. The detrimental effects of intercarrier interference (ICI) resulting from the non-orthogonality between subcarriers are efficiently mitigated with the aid of eigenvalue-decomposition-based precoding. Our simulation results demonstrate that the proposed precoded NOFDM-SIM system exhibits a similar peak-to-average power ratio to OFDM and OFDM-SIM counterparts while achieving the bit error rate limit of zero-ICI OFDM in a channel-uncoded setting. We analyze the power spectral density of the proposed scheme to demonstrate that the proposed scheme is strictly bandlimited, unlike its orthogonal counterpart. Furthermore, we present detailed investigations of the effects on ICI in the proposed scheme with and without precoding as well as power allocation. Finally, we introduce a three-stage iterative decoding architecture for our proposed schemes and show near-capacity error performance.

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“…The proposed scheme was originally introduced in our preliminary report[37], which did not include a theoretical BER analysis, detailed performance comparisons, the characterization of MED and ISI, or a nearcapacity turbo-coded architecture.…”

mentioning

confidence: 99%

Eigendecomposition-Precoded Faster-Than-Nyquist Signaling With Index Modulation

Chaki

Ishihara

Sugiura

2022

IEEE Trans. Commun.

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In this paper, we propose a precoded faster-than-Nyquist (FTN) signaling technique for time-domain single-carrier index-modulated symbol transmission. More precisely, eigenvalue decomposition (EVD) precoding is adopted for the FTN transmission of data bits modulated by single-carrier time-domain index modulation (IM). While the FTN scheme increases the spectral efficiency and data rate by increasing the density of transmit symbols, the time-domain IM works towards the same objective while maintaining symbol sparsity. We analytically derive the constrained capacity of the proposed system. Our simulation results show that the proposed scheme has better bit error ratio (BER) performance than the conventional FTN-IM scheme, particularly for the scenario of a higher packing ratio. With the proposed scheme, a 2.5 dB performance gain is observed at the BER of 10 −4 , where the packing ratio is 0.7 and the rolloff factor is 0.5 in the channel-uncoded scenario. We further analyze our scheme's performance by characterizing its minimum Euclidean distance and inter-symbol interference. Furthermore, we present a three-stage serially concatenated iterative detection architecture for the proposed EVD-FTN-IM signaling scheme. It is demonstrated in our simulations that a near-capacity BER performance is achievable in the proposed turbo-coded FTN-IM scheme.

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Eigenvalue Decomposition Precoded Faster-Than-Nyquist Transmission of Index Modulated Symbols

Cited by 6 publications

References 25 publications

Faster-than-Nyquist Signaling for MIMO Communications

Faster-than-Nyquist Signaling for MIMO Communications

Precoded Filterbank Multicarrier Index Modulation With Non-Orthogonal Subcarrier Spacing

Eigendecomposition-Precoded Faster-Than-Nyquist Signaling With Index Modulation

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