Examining the Performance of Walsh-DSSS Against FBMC-SS in HF Channels

Hunt, Brandon T.; Haab, David B.; Sego, Thomas Cameron; Holschuh, Tom V.; Moradi, Hussein; Farhang‐Boroujeny, Behrouz

doi:10.1109/milcom52596.2021.9652983

Cited by 2 publications

(2 citation statements)

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“…Obviously, when using the real PAM modulation, after eliminating the influence of the channel, the imaginary part of the symbol estimate

will consist only of the imaginary part of the intrinsic interference

; therefore, it can be easily defined in the receiver as

. In [ 7 ], it was first established that for the single-input–single-output (SISO) channel, there is a correlation between the real part of

and the imaginary part of

, where

is a nonzero time shift. Thus, knowing the imaginary part of the interference and the correlation between the real and imaginary parts, it becomes possible to estimate the real part.…”

Section: Real and Imaginary Parts Of Interference Correlationmentioning

confidence: 99%

“…The applicability of FBMC modulation for high-frequency (HF) channels was introduced in [ 5 ] with the addition of the spread-spectrum (SS) technique, and the robustness of the introduced modulation technology was proved for channels with low SNR values and a wide range of Doppler spread and delays. Further, the same authors in [ 6 , 7 ] provide theoretical and practical comparisons of the FBMC-SS system and Walsh sequence-based direct sequence spread systems (DSSS). The same authors in [ 8 ] presented an analysis of FBMC-SS performance in doubly dispersive HF channels and showed methods of system parameter optimization to reduce the influence of doubly dispersive channel distortions.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of FBMC-OQAM Equalization with Real Interference Prediction Algorithm Properties for MIMO Transmission Scheme

Varlamov

Lobov

Lobova

2023

Sensors

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Increasing the data transfer rate is an urgent task in cellular, high-frequency (HF) and special communication systems. The most common way to increase the data rate is to expand the bandwidth of the transmitted signal, which is often achieved through the use of multitone systems. One such system is the filter bank multicarrier (FBMC). In addition, speed improvements are achieved using multi-input–multi-output (MIMO) systems. In this study, we developed an algorithm for equalizing FBMC signals with offset-QAM modulation (OQAM) with self-interference compensation due to its correlation properties in a MIMO channel with memory. An analytical derivation of the proposed algorithm and an analysis of the computational complexity are given. According to the results of simulation modeling and a comparative analysis of performance in terms of the bit error rate and error vector magnitude with solutions with similar computational complexity, a similar level of performance was shown compared to a more complex parallel multistage algorithm, and a better performance was demonstrated compared to a one-tap algorithm.

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“…Obviously, when using the real PAM modulation, after eliminating the influence of the channel, the imaginary part of the symbol estimate

will consist only of the imaginary part of the intrinsic interference

; therefore, it can be easily defined in the receiver as

. In [ 7 ], it was first established that for the single-input–single-output (SISO) channel, there is a correlation between the real part of

and the imaginary part of

, where

is a nonzero time shift. Thus, knowing the imaginary part of the interference and the correlation between the real and imaginary parts, it becomes possible to estimate the real part.…”

Section: Real and Imaginary Parts Of Interference Correlationmentioning

confidence: 99%