Performance of Non-coherent MFSK with Selection and Switched Diversity Over Hoyt Fading Channel

Chandra, Aniruddha; Bose, Chayanika; Bose, Manas Kr.

doi:10.1007/s11277-011-0457-6

Cited by 19 publications

(15 citation statements)

References 31 publications

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“…3), we set out to investigate the performance of postdetection SWC and compare the same with the results available for predetection SWC [4]. In general, for an order-L diversity system operating over i.n.d.…”

Section: Sep For Postdetection Switched Combiningmentioning

confidence: 99%

“…In the recent past, there has been a renewed interest about the relatively less studied Nakagami-q or Hoyt fading model [1], and performance of ncMFSK over Hoyt channel with different forms of predetection diversity combining have been reported [2][3][4]. However, to the best of authors' knowledge, the error performance with postdetection diversity combining over Hoyt channels has not been studied so far.…”

Section: Introductionmentioning

confidence: 99%

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Symbol error probability of non-coherent M-ary frequency shift keying with postdetection selection and switched combining over Hoyt fading channel

Chandra¹,

Bose

Bose³

2012

IET Commun.

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For mitigating the deleterious effects caused by time-varying multipath fading, most of the modern digital wireless systems employ some sort of diversity combining. Combining of the different diversity branches, however, may be performed either before demodulation (predetection combining), or after it (postdetection combining). It has been shown earlier that postdetection schemes outperform their predetection counterparts for Rayleigh and less-severe-than Rayleigh (e.g. Rician)-fading channels. In this study, the authors consider Hoyt fading that characterises wireless environments experiencing moresevere-than Rayleigh fading, and compare error performance of postdetection combining with the results available for predetection combining. In particular, two of the combining variants namely selection combining and switched combining are investigated, and symbol error probability of a non-coherent M-ary frequency shift keying receiver is derived for independent but not necessarily identical diversity branches. The comparison reveals that postdetection schemes perform better than predetection combiners when the average branch signal-to-noise ratio (SNR) exceeds some crossover SNR.

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Section: Sep For Postdetection Switched Combiningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Symbol error probability of non-coherent M-ary frequency shift keying with postdetection selection and switched combining over Hoyt fading channel

Chandra¹,

Bose

Bose³

2012

IET Commun.

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“…These conditions typically correspond to enriched multipath fading with Hoyt distribution is used to characterize the bad state, while Rician distribution accounts for the good state [31]. The Hoyt fading model is also relatively general as it includes as special cases both one-sided Gaussian fading (q = 0) and Rayleigh fading (q = 1).…”

Section: Introductionmentioning

confidence: 99%

Energy detection based spectrum sensing over enriched multipath fading channels

Bagheri

Sofotasios

Tsiftsis

et al. 2016

2016 IEEE Wireless Communications and Networking Conference

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Abstract-Energy detection has been for long constituting the most popular sensing method in RADAR and cognitive radio systems. The present paper investigates the sensing behaviour of an energy detector over Hoyt fading channels, which have been extensively shown to provide rather accurate characterization of enriched multipath fading conditions. To this end, a simple series representation and an exact closed-form expression are firstly derived for the corresponding average probability of detection for the conventional single-channel communication scenario. These expressions are subsequently employed in deriving novel analytic results for the case of both collaborative detection and squarelaw selection diversity reception. The derived expressions have a relatively tractable algebraic representation which renders them convenient to handle both analytically and numerically. As a result, they can be utilized in quantifying the effect of fading in energy detection based spectrum sensing and in the determination of the trade-offs between sensing performance and energy efficiency in cognitive radio communications. Based on this, it is shown that the performance of the energy detector depends highly on the severity of fading as even slight variations of the fading conditions affect the value of the average probability of detection. It is also clearly shown that the detection performance improves substantially as the number of branches or collaborating users increase. This improvement is substantial in both moderate and severe fading conditions and can practically provide full compensation for the latter cases.

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“…Apart from demodulating the received signal, a digital communication receiver, when equipped with multiple antennas, has an additional task of combining the signals received through different diversity branches. Altering the relative order of the combining and the demodulation processes results in two variants of a diversity receiver architecture, namely pre-detection [1], and post-detection [2]. Post-detection combiners avoid monitoring of the instantaneous branch SNRs, and outperform their pre-detection counterparts for IID Rayleigh and less-severe-than Rayleigh (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Quite contrary to Rayleigh, Rician, or Nakagami-m (m ≥ 1) channels, it was already demonstrated [2] that a crossover between the error rates of preand post-detection dual branch switch-and-stay combiner (SSC) occurs in Hoyt channel, even for IID diversity branches. Motivated by this fact, we set out to investigate in this paper whether such crossover occurs for an order-L switched combiner too.…”

Section: Introductionmentioning

confidence: 99%

Performance of order-<I>L</I> post detection switch and examine combiner in Hoyt fading

Chandra

Bose

2012

IEICE ComEX

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Closed-form error probability expressions for a L(≥ 2) branch post-detection switch-and-examine combiner (SEC), using noncoherent M -ary frequency shift keying (ncMFSK) modulation and operating over independent and identically distributed (IID) Hoyt fading channel, are derived. Under similar channel and receiver constraints, derived error rates are compared with results available for pre-detection combining. It was observed that an additional diversity gain is achievable with post-detection scheme when the average channel signal-tonoise ratio (SNR) exceeds some crossover SNR value that depends on modulation order (M ), fading parameter (q), and number of diversity branches (L).

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Performance of Non-coherent MFSK with Selection and Switched Diversity Over Hoyt Fading Channel

Cited by 19 publications

References 31 publications

Symbol error probability of non-coherent M-ary frequency shift keying with postdetection selection and switched combining over Hoyt fading channel

Symbol error probability of non-coherent M-ary frequency shift keying with postdetection selection and switched combining over Hoyt fading channel

Energy detection based spectrum sensing over enriched multipath fading channels

Performance of order-<I>L</I> post detection switch and examine combiner in Hoyt fading

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