Enhanced Widely Linear Filtering to Make Quasi-Rectilinear Signals Almost Equivalent to Rectilinear Ones for SAIC/MAIC

Chevalier, Pascal; Chauvat, Remi; Delmas, Jean

doi:10.1109/tsp.2017.2784403

Cited by 11 publications

(4 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such joint detection algorithms could relax the constraints on guard bands between channels and hence improve the spectral efficiency. Interference cancellation in multi-carrier systems with time-frequency localized waveforms is an on-going research topic and remains an open problem, for a detailed study see [11].…”

Section: Perspectives and Conclusion A Perspectives And Filtered Wamentioning

confidence: 99%

Mitigation of Carrier Frequency Offset in a Sub-THz Channel Bonding Scenario

Bicaïs

Doré

2019

2019 IEEE 30th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC Workshops)

View full text Add to dashboard Cite

Wireless communications in the sub-THz bands are contemplated to achieve the soon required Tbit/s data rate. To fulfill this requirement, sub-THz transceivers aggregate several carriers, or in other words, implement channel bonding. In this paper we investigate the mitigation of the carrier frequency offset impact on channel bonding systems. In contrast to the literature, we consider that each of the carriers is corrupted by an independent random carrier frequency offset. Moreover, we do not address the carrier frequency offset estimation to compensate it but instead the optimization of the demodulation to mitigate the impact of this impairment. First, a system model is presented to describe channel bonding transceivers corrupted by carrier frequency offsets and the analytical expression of the resulting interference is outlined. Second, we pursue the analytical study for systems using waveforms with rectangular pulse-shaping. By evaluating the capacity, it is exhibited that a detection algorithm jointly demodulating the carriers could enhance the performance. Third, several detection algorithms are introduced and compared by means of numerical simulations. We show that a joint linear detection algorithm achieves a significant performance gain in comparison to a receiver demodulating independently the carriers.

show abstract

Section: Perspectives and Conclusion A Perspectives And Filtered Wamentioning

confidence: 99%

Mitigation of Carrier Frequency Offset in a Sub-THz Channel Bonding Scenario

Bicaïs

Doré

2019

2019 IEEE 30th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC Workshops)

View full text Add to dashboard Cite

show abstract

“…In addition, for signals corrupted by one single improper interference, it has been demonstrated by the Single Antenna Interference Cancellation scheme (SAIC) proposed in [12], that widely linear receivers can drastically suppress the effect of this interference. Other approaches with the SAIC system for cancellation of interferences (ISI and CCI) were investigated in [13], [14].…”

Section: Imentioning

confidence: 99%

Study of Widely Linear SC-FDE Systems for Interference Cancellation

Chang

Pereira

Rocha

2019

JCIS

View full text Add to dashboard Cite

In this paper, a performance analysis of widely linear (WL) equalizers for single carrier systems using frequency domain equalization (SC-FDE) under multiple independent interferences is presented. In this context, the expressions of the mean square error (MSE) and bit error rate (BER) for linear and WL equalizers in their regular and iterative versions for this scenario were derived. It was seen that the results obtained with these expressions match the simulated ones. They also show that the performance of the WL equalizers is better when compared to their linear versions regardless of the number of interferences.

show abstract

“…Existing remedial CCI mitigation schemes are basically model-based. For single-receiver systems, typical solutions include the analog/digital notch filters (NF) that introduce spectral nulls at the CCI band [3] and the widely linear filters (WLF) that extract the desired signal based on its cyclostationarity [4]. However, the performance of above schemes deteriorates remarkably when the CCI is significantly stronger than the desired signal.…”

Section: Introductionmentioning

confidence: 99%

Signal demodulator based on in‐phase and quadrature interference‐robust feature

Wen

X²,

Wang

et al. 2022

Electronics Letters

View full text Add to dashboard Cite

This letter examines the issue of mitigating strong co-channel interference in communication systems is addressed. Unlike conventional model-based methods, a novel data-driven scheme is proposed. A recurrent neural network is trained to directly demodulate the desired signal under strong co-channel interference. Instead of inputting the original received signal, in-phase and quadrature interference-robust features are extracted through preprocess. The recurrent neural network is then trained offline to implement sequence labelling, with the interferencerobust feature sequences and known code sequences of the desired signal as inputs and ground-truth labels. Meanwhile, a guard zone is introduced when loading the interference-robust feature sequences to enable better contextual information exploitation by the recurrent neural network demodulator. Online tests validated the low bit error rate of the recurrent neural network demodulator, under strong co-channel interference. Moreover, the proposed scheme outperformed existing modelbased and data-driven interference mitigation schemes in terms of the bit error rate, especially in low signal-to-interference ratio region. Inspiringly, the proposed data-driven scheme generalized well to varied unseen test conditions.

show abstract

Enhanced Widely Linear Filtering to Make Quasi-Rectilinear Signals Almost Equivalent to Rectilinear Ones for SAIC/MAIC

Cited by 11 publications

References 49 publications

Mitigation of Carrier Frequency Offset in a Sub-THz Channel Bonding Scenario

Mitigation of Carrier Frequency Offset in a Sub-THz Channel Bonding Scenario

Study of Widely Linear SC-FDE Systems for Interference Cancellation

Signal demodulator based on in‐phase and quadrature interference‐robust feature

Contact Info

Product

Resources

About