Spread Spectrum Technique Using Staggered Multi-tone

Stevens, Austin M.; Sibbett, Taylor; Driggs, Jonathan; Moradi, Hussein; Farhang‐Boroujeny, Behrouz

doi:10.1109/icnc47757.2020.9049825

Cited by 1 publication

(2 citation statements)

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“…If the noise is flat across the entire band of interest and the power estimates are accurate, the NMF output will be equivalent to the SMF output multiplied by some scalar. When interferers exist in a subset of the subcarriers, the normalization process will attenuate the respective subcarrier signals, effectively balancing their impact on the overall output response, much in the same way as the MRC coefficients (14). This method's ability to perform a weighting operation without the need for pilot symbols, or any prior knowledge of the interference statistical information, makes it an invaluable tool when operating in harsh environments where subcarriers are corrupted by varying levels of interference.…”

Section: Normalized Matched Filtermentioning

confidence: 99%

“…This in the FB-MC literature is widely know as filtered multitone (FMT) and was first proposed by those working in the area of digital subscriber lines, [10], [11]. The use of FB-MC systems that operate based on offset quadrature amplitude modulation (OQAM), [12], [13], to spread spectrum systems is also possible and has been reported in [14]. However, the overlapping of subcarrier bands add some complexity to its implementation.…”

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confidence: 99%

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Normalized Matched Filter for Blind Interference Suppression in Filter Bank Multicarrier Spread Spectrum Systems

2022

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This paper proposes and analyzes a modification to the standard matched filtering operation utilized in filter-bank multicarrier spread spectrum (FB-MC-SS) communications. This modification suppresses the impact of partial-band interferers without a priori knowledge of their location within the band of transmission and/or their power characteristics. A performance analysis of the proposed matched filter, which indicates its usefulness in environments where interference is likely to be experienced, is presented. It is shown that whereas the standard matched filter proves to be ineffective for packet detection and timing acquisition in such harsh environments, the modified matched filter successfully removes the harmful effects of interferers. This is found to be a unique feature of FB-MC-SS which is non-existent in other alternative spread spectrum methods.

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Section: Normalized Matched Filtermentioning

confidence: 99%