Publication:
Adaptive Modulation With CAZAC Preamble-Based Signal-to-Noise-Ratio Estimator in OFDM Cooperative Communication System

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dc.contributor.authorManzoor S.en_US
dc.contributor.authorOthman N.S.en_US
dc.contributor.authorid25825314900en_US
dc.contributor.authorid56426823300en_US
dc.date.accessioned2023-05-29T09:38:59Z
dc.date.available2023-05-29T09:38:59Z
dc.date.issued2022
dc.descriptionAdaptive modulation; Autocorrelation; Cooperative communication; Orthogonal frequency division multiplexing; Phase shift keying; Signal to noise ratio; Throughput; Channel throughput; Communications systems; Constant amplitude zero autocorrelation; Constant amplitude zero autocorrelation preamble; Data-aided; Data-aided SNR estimator; Ratio estimators; Single-input/ single outputs; SNR estimators; Spectral efficiencies; Spectrum efficiencyen_US
dc.description.abstractThis paper presents an adaptive modulation in a single-input-single-output (SISO)-OFDM-based cooperative system that employs a Constant Amplitude Zero Autocorrelation (CAZAC) preamble-based SNR estimator. A novel CAZAC preamble-based SNR estimator that does not incur a throughput penalty is derived by exploiting a modified CAZAC preamble structure for the OFDM system. The proposed CAZAC SNR estimator is used to estimate the channel quality by finding the instantaneous SNR of the received cooperative data, which is sent to the transmitter via feedback channel. The modulation scheme is then changed according to the estimated SNR. The performance of the CAZAC preamble-based SNR estimator exhibits less than 0.02 dB and less than 0.2 dB bias when communicating over AWGN and SUI-5 channels, respectively. The proposed adaptive modulation scheme with the CAZAC SNR estimator significantly improved the channel throughput in comparison with the corresponding benchmarker scheme dispensing with adaptive modulation that invokes M-PSK and M-QAM. More explicitly, the proposed adaptive modulation system with the CAZAC SNR estimator that invokes M-PSK exhibits significant improvement by about 5 dB at BER = 10-3 in comparison to its corresponding benchmarker scheme dispensing with adaptive modulation when communicating over the SUI-5 channel. On the other hand, the relay-aided cooperative transmission exhibited an approximately 6 dB SNR gain in terms of channel throughput in comparison to the corresponding non-cooperative benchmarker scheme, and benefited from spatial diversity. � 2013 IEEE.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1109/ACCESS.2022.3225437
dc.identifier.epage126560
dc.identifier.scopus2-s2.0-85144058809
dc.identifier.spage126550
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85144058809&doi=10.1109%2fACCESS.2022.3225437&partnerID=40&md5=3b31ea8f26e2ed16642ec3f8c18b98b7
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/27047
dc.identifier.volume10
dc.publisherInstitute of Electrical and Electronics Engineers Inc.en_US
dc.relation.ispartofAll Open Access, Gold
dc.sourceScopus
dc.sourcetitleIEEE Access
dc.titleAdaptive Modulation With CAZAC Preamble-Based Signal-to-Noise-Ratio Estimator in OFDM Cooperative Communication Systemen_US
dc.typeArticleen_US
dspace.entity.typePublication
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