Diversity combining for fast frequency hopping multiple access systems subjected to Nakagami-m fading

Ahmed, Sajid; Yang, Lie‐Liang; Hanzo, Lajos

doi:10.1049/cp:20050225

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…The RRS combining method uses the ranks of the values in the L × M matrix to make a decision rather than using the actual values, whereas in the NED receiver, the output of each detector is normalised by the sum of the outputs obtained from all M detectors [56,57]. OS-NED diversity combining is a combination of order statistics and NED combining, in which the L outputs of each of the M detectors are first ranked in the ascending order according to the magnitude and the self-normalisation operation is then performed on the matrix of sorted values [56,57]. Among these four diversity-combining techniques, the OS-NED has been shown to give the best system performance [56].…”

Section: Mitigation Of Maimentioning

confidence: 99%

Survey on diversity‐combining techniques for interference suppression in fast frequency hopping systems

Le¹,

Teh²,

Li³

2015

IET Communications

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Over the past few decades, frequency hopping (FH) techniques have attracted considerable interest in both military and commercial communications. However, fading and interference can significantly degrade the performance of an FH system. One method commonly employed to overcome the degradation in performance because of the fading is the use of diversity. Furthermore, fast FH (FFH) systems can enjoy both time and frequency diversity and hence FFH systems employed in conjunction with diversity-combining techniques are effective for combating fading and interference effects. In this study, the authors provide a comprehensive survey on the past and current research work on diversity-combining techniques for suppressing different types of interference in FFH M-ary frequency-shiftkeying systems over various fading channels. Some commonly used theoretical approaches for analysing performance of FFH systems are also presented. In addition to the survey, they will also discuss some interesting areas of future work in this research topic.

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Section: Mitigation Of Maimentioning

confidence: 99%

Survey on diversity‐combining techniques for interference suppression in fast frequency hopping systems

Le¹,

Teh²,

Li³

2015

IET Communications

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“…For the order statistics-NED (OS-NED) diversity-combining receiver, it is a combination of order statistics and NED combining, in which the L outputs of each of the M square-law detectors are first ranked in the ascending order according to the magnitude as [58], [59]…”

Section: Order Statistics-ned Receivermentioning

confidence: 99%

“…[58]. The RRS combining method uses the ranks of the values in the L × M matrix to make a decision rather than using actual values, whereas in the NED receiver, the output of each detector is normalized by the sum of the outputs of all M detectors [58], [59]. Among these four diversity-combining techniques, the OS-NED has been shown to have the best system performance [58].…”

Section: Mti Mitigationmentioning

confidence: 99%

Performance analysis of optimum receivers for fast frequency-hopped systems over composite interference and fading channels with imperfect side information

Le¹

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“…For the self-normalizing receiver, no side information is required. Performance studies of the self-normalizing receiver under different jamming and interference conditions have been shown in [22] and [55]- [61]. BER performance of FFH/BFSK systems over non-fading channels with PBNJ was studied in [22] and [55].…”

Section: Self-normalizing Receivermentioning

confidence: 99%

“…The analysis was later extended to a more general FFH/MFSK system over frequency non-selective Ricianfading channels in [60]. In [61], the effect of MAI and Nakagami-m fading channels on BER performance of the self-normalizing receiver was investigated.…”

Section: Self-normalizing Receivermentioning

confidence: 99%

Interference suppression for fast frequency-hopped communication systems over fading channels

Zhang¹

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In this thesis, we consider interference suppression for fast frequency-hopped (FFH) communication systems over fading channels. Three types of interference, namely, partial-band noise jamming (PBNJ), multitone jamming (MTJ) and multiple-access interference (MAI), are of interest. To suppress the effect of PBNJ, we propose a maximum-likelihood (ML) receiver for frequency-selective Rayleigh-fading channels and derive the corresponding analytical bit-error rate (BER) expressions. We then focus on a more general frequency-selective Rician-fading channel, in which an optimum ML receiver structure is proposed. In addition, two suboptimum ML receivers and their corresponding analytical BER expressions are presented. Furthermore, the linear-combining and product-combining receivers are also investigated under the same channel conditions. To mitigate the composite effect of MTJ and PBNJ, we present analytical BER expressions for an ML receiver under frequency non-selective Rayleigh-fading channel conditions. Following that, frequency-selective Rayleigh-fading channels are considered. System performance of the linear-combining, product-combining and ML receivers is studied and compared. We then investigate the effects of timing and frequency offsets on system performance under frequency non-selective Ricianfading channel conditions. Numerical results show that the FFH system is very sensitive to the timing and frequency offsets. vii ATTENTION: The Singapore Copyright Act applies to the use of this document. Nanyang Technological University Library Lastly, we focus on the suppression of MAI. An optimum ML receiver and two suboptimum ML receivers, namely, the ML-A and ML-B receivers, are proposed for synchronous systems over frequency non-selective Rician-fading channels. Analytical BER expressions of these two proposed suboptimum ML receivers are presented. In addition, we study the system performance of the linear-combining, product-combining and clipper receivers, and compare their BER performance with the proposed optimum and two suboptimum ML receivers. Performance comparisons show that the proposed optimum ML receiver has the best BER performance,

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Diversity combining for fast frequency hopping multiple access systems subjected to Nakagami-m fading

Cited by 7 publications

References 4 publications

Survey on diversity‐combining techniques for interference suppression in fast frequency hopping systems

Survey on diversity‐combining techniques for interference suppression in fast frequency hopping systems

Performance analysis of optimum receivers for fast frequency-hopped systems over composite interference and fading channels with imperfect side information

Interference suppression for fast frequency-hopped communication systems over fading channels

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