Delay-Doppler modulation

Hong, Yi; Thaj, Tharaj; Viterbo, Emanuele

doi:10.1016/b978-0-32-385028-5.00012-8

Cited by 18 publications

(46 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table I shows the considered simulation setup. We use the Extended Vehicular A (EVA) channel model [8]. Let ν max = f vmax c be the maximum Doppler shift, with f the frequency in Hz, v max the user's speed in m/s and c the speed of light in m/s.…”

Section: Performance Measures and Resultsmentioning

confidence: 99%

Doppler-Resilient Universal Filtered MultiCarrier (DR-UFMC): A Beyond-OTFS Modulation

D’Andrea¹,

Buzzi²,

Fresia³

et al. 2023

Preprint

View full text Add to dashboard Cite

In the past few years, some alternatives to the Orthogonal Frequency Division Multiplexing (OFDM) modulation have been considered to improve its spectral containment and its performance level in the presence of heavy Doppler shifts. This paper examines a novel modulation, named Doppler-Resilient Universal Filtered MultiCarrier (DR-UFMC), which has the objective of combining the advantages provided by the Universal Filtered MultiCarrier (UFMC) modulation (i.e., better spectral containment), with those of the Orthogonal Time Frequency Space (OTFS) modulation (i.e., better performance in timevarying environments). The paper contains the mathematical model and detailed transceiver block scheme of the newly described modulation, along with a numerical analysis contrasting DR-UFMC against OTFS, OFDM with one-tap frequency domain equalization (FDE), and OFDM with multicarrier multisymbol linear MMSE processing. Results clearly show the superiority, with respect to the cited benchmarks, of the newly proposed modulation in terms of achievable spectral efficiency. Interestingly, it is also seen that OFDM, when considered in conjunction with multicarrier multisymbol linear minimum mean squares error (MMSE) processing, performs slightly better than OTFS in terms of achievable spectral efficiency.

show abstract

Section: Performance Measures and Resultsmentioning

confidence: 99%

Doppler-Resilient Universal Filtered MultiCarrier (DR-UFMC): A Beyond-OTFS Modulation

D’Andrea¹,

Buzzi²,

Fresia³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…with the notation of that x ∆ = vec(X). Considering the reduced cyclic prefix frame format, at the receiver side, after discarding the CP, we can rewrite (5) in the vectorized form by discretizing the time-domain received signal at a rate f s = M ∆f as [36] r (11) where [•] M N denotes mod-M N operation and q = 0, ..., M N − 1. Therefore, the discrete time-domain inputoutput relation in a vector form can be given by…”

Section: Preliminaries a Otfsmentioning

confidence: 99%

“…where P denotes the number of paths, h i , τ i , and ν i denote the path gain, delay, and Doppler shift of the i-th path, respectively. Note that τ i and ν i depend on the delay and Doppler indices of the i-th path, which are given by [36]…”

Section: A Otfsmentioning

confidence: 99%

“…Considering the reduced cyclic prefix frame format, at the receiver side, after discarding the CP, we can rewrite (5) in the vectorized form by discretizing the time-domain received signal at a rate f s = M ∆f as [36] r…”

Section: A Otfsmentioning

confidence: 99%

“…Similar to (35) and (36), the extrinsic information of s in terms of the mean and covariance matrix is given by…”

Section: Cross-domain Message Passingmentioning

confidence: 99%

See 2 more Smart Citations

OTFS-SCMA: A Downlink NOMA Scheme for Massive Connectivity in High Mobility Channels

Wen

Yuan

Liu

et al. 2023

IEEE Trans. Wireless Commun.

View full text Add to dashboard Cite

This paper studies a downlink system that combines orthogonal-time-frequency-space (OTFS) modulation and sparse code multiple access (SCMA) to support massive connectivity in high-mobility environments. We propose a cross-domain receiver for the considered OTFS-SCMA system which efficiently carries out OTFS symbol estimation and SCMA decoding in a joint manner. This is done by iteratively passing the extrinsic information between the time domain and the delay-Doppler (DD) domain via the corresponding unitary transformation to ensure the principal orthogonality of errors from each domain. We show that the proposed OTFS-SCMA detection algorithm exists at a fixed point in the state evolution when it converges. To further enhance the error performance of the proposed OTFS-SCMA system, we investigate the cooperation between downlink users to exploit the diversity gains and develop a distributed cooperative detection (DCD) algorithm with the aid of belief consensus. Our numerical results demonstrate the effectiveness and convergence of the proposed algorithm and show an increased spectral efficiency compared to the conventional OTFS transmission.

show abstract

Performance Analysis of Emerging Waveforms for 6G Wireless Communications

Raslan,

Abdel-Atty

2024

Earth and Environmental Sciences Library

View full text Add to dashboard Cite

Delay-Doppler modulation

Cited by 18 publications

References 17 publications

Doppler-Resilient Universal Filtered MultiCarrier (DR-UFMC): A Beyond-OTFS Modulation

Doppler-Resilient Universal Filtered MultiCarrier (DR-UFMC): A Beyond-OTFS Modulation

OTFS-SCMA: A Downlink NOMA Scheme for Massive Connectivity in High Mobility Channels

Performance Analysis of Emerging Waveforms for 6G Wireless Communications

Contact Info

Product

Resources

About