A new land mobile satellite channel model with Nakagami-q distribution

Hazra, Sayantan; Mitra, Abhijit

doi:10.1109/ncc.2012.6176857

Cited by 3 publications

(7 citation statements)

References 11 publications

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“…Owing to the slowly time-varying nature of shadow fading process Y, the variation of its time derivativeẎ can be ignored, that iṡ Y = 0. This assumption implies that p Y ,Ẏ (y,ẏ) = p Y (y)d(ẏ) [2,14]. Equation (11) is thus reduced to…”

Section: First-order Statisticsmentioning

confidence: 99%

“…Based on this assumption, we can say that the expression of LCR in (17) is a generalised version covering several aspects and one of its marginal cases withẎ = 0 is reported in [14]. Using the knowledge of computed LCR, AFD, which is defined as the average period of time for which the received signal is below a specified threshold level R, can be computed as…”

Section: First-order Statisticsmentioning

confidence: 99%

“…Our proposed model can also be viewed as a generalisation of the additive Rayleigh-lognormal model presented in [1], since Rayleigh distribution is a special case of Nakagami-q. A prototype of this model has been presented in [14]. However, the expression of level crossing rate (LCR) in [14] was derived on the assumption, based on the slowly time-varying nature of shadow fading, that the time derivative of shadow fading process is zero.…”

Section: Introductionmentioning

confidence: 99%

“…A prototype of this model has been presented in [14]. However, the expression of level crossing rate (LCR) in [14] was derived on the assumption, based on the slowly time-varying nature of shadow fading, that the time derivative of shadow fading process is zero. This led to an approximate expression of LCR.…”

Section: Introductionmentioning

confidence: 99%

“…It only affects the autocorrelation function and power spectral density (PSD) of signal which in turn modifies the second-order moments and eventually the second-order statistics such as LCR and average fade duration (AFD). The proposed model is sufficiently general to model all the above-mentioned conditions and therefore cannot be viewed as an extension of the specific model reported in [14].…”

Section: Introductionmentioning

confidence: 99%

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Additive statistical modelling of land mobile satellite channels in three-dimensional scattering environment

Hazra

Mitra

2012

IET Commun.

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A new channel model with additive complex envelope process for land mobile satellite channel is proposed. The two fading processes, small-scale fading and shadow fading, are represented with Nakagami-q and lognormal distribution, respectively. Exact analytical expressions of first-and second-order statistics are derived for the proposed model. For the purpose of normalisation of second-order statistics with respect to maximum Doppler frequency, a three-dimensional scattering model is taken. A special case of the authors' proposed channel model gives rise to a new distribution, 'extended Nakagami-q distribution', and the same is reported with its statistics. The dependence of second-order statistics on different parameters is analysed with the computed results obtained from derived expressions. The results computed from the analytical expressions are also in good resemblance with the corresponding measurement results in a suburban propagation environment.

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Section: First-order Statisticsmentioning

confidence: 99%

Section: First-order Statisticsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Additive statistical modelling of land mobile satellite channels in three-dimensional scattering environment

Hazra

Mitra

2012

IET Commun.

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A multiple‐input, multiple‐output broadcasting system with space, time, polarization, and labeling diversity

Patel

Quazi

2022

Trans Emerging Tel Tech

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Enhancing the reliability of wireless links plays an important role in addressing the digital divide between under-developed and developed nations. Diversity techniques are used in wireless communication to improve link reliability. This article presents a broadcasting system that incorporates space, time, polarization and labeling diversity. The key challenge in incorporating labeling diversity into a system is the design of appropriate bit-to-symbol mappers. The latest technique to designing bit-to-symbol mappers is to use a genetic algorithm approach, which is applicable to any generic modulation scheme. This article presents a modified genetic algorithm mapper design algorithm based on recent advances in labeling diversity evaluation theory. The proposed system is studied under ideal (uncorrelated) conditions, as well as in the presence of inter-beam and inter-antenna inference (correlated conditions). Analytical expressions are presented to model both the correlated and uncorrelated systems, and are verified via Monte Carlo simulations. When compared to the best comparable scheme at a bit-error-rate of 10 −6 , results show that the proposed system improves performance by ≈7 dB for a 2 × 2 16APSK system configuration, and by ≈5 dB for both 2 × 4 32APSK and 2 × 2 64APSK system configurations.Results also show that the proposed system is highly sensitive to correlation at the transmitting node. In particular, transmit-side correlation degrades link reliability by 4 orders of magnitude for the 2 × 3 8APSK configuration studied at 25 dB.

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