نتایج جستجو برای: nakagami distribution

تعداد نتایج: 609373  

2012
Smita Tiwari Fadhel Ghannouchi

This paper investigates 3D positioning in an indoor line of sight (LOS) and nonline of sight (NLOS) combined environment. It is a known fact that time-of-arrival-(TOA-) based positioning outperforms other techniques in LOS environments; however, multipath in an indoor environment, especially NLOS multipath, significantly decreases the accuracy of TOA positioning. On the other hand, received-sig...

Journal: :Electronics Letters 2023

This paper analyzes the secrecy outage probability of amplify and forward (AF) relaying with triple selection over real valued Nakagami fading channels. derives new upper bound cumulative distribution function expressions proposed system for received signal to noise ratio in which maximal combining receivers are considered. Further, this lower asymptotic probability. An interesting numerical re...

Journal: :Ultrasonics 2012
Christian Wachinger Tassilo Klein Nassir Navab

The derivation of statistically optimal similarity measures for intensity-based registration is possible by modeling the underlying image noise distribution. The parameters of these distributions are, however, commonly set heuristically across all images. In this article, we show that the estimation of the parameters on the present images largely improves the registration, which is a consequenc...

2008
MIHAJLO STEFANOVIĆ DRAGANA KRSTIĆ PETAR NIKOLIĆ SRDJAN JOVKOVIC DUSAN STEFANOVIĆ Aleksandra Medvedeva

Level crossing rate, outage probability and fade duration of the SSC combiner output signal are determined in this paper. The presence of the Nakagami-m fading at the input is observed. The results are shown graphically for different variance values and decision threshold values. Key-Words: Diversity reception, Level Crossing Rate, Fade Duration, Outage Probability, Nakagami-m fading, SSC Combi...

2014
Weijun Cheng

In this paper, we present the end-to-end performance of a dual-hop amplify-and-forward (AF) relaying system over independent nonidentical (non-i.i.d) composite Nakagami-lognormal (NL) fading channels by using mixture gamma (MG) distribution. Novel closedform expressions for the probability density function (PDF) and the moment-generation function (MGF) of the end-to-end signal-tonoise ratio (SN...

2000
Wei Zhang Nader Moayeri

Abstract The antenna height and directivity are used in the classification of statistical channel models for local multipoint distribution service (LMDS). When directional antennas are used and the antennas are sufficiently high providing a line-of-sight (LOS) propagation path between the transmitter and receiver, the statistics of the radio channel can be described by the lognormal or Nakagami...

Journal: :JCP 2013
Weijun Cheng

In this paper, we present the end-to-end performance of a multi-node cooperative network over independent non-identical composite Nakagami-lognormal (NL) fading channels using Mixture Gamma (MG) distribution. Novel closed-form expressions for the Probability density function (PDF) and the Momentgeneration function (MGF) of the end-to-end Signal-to-noise ratio (SNR) are derived. Moreover, the av...

2007
Joy Iong-Zong Chen Wen Liou Wen Sheng Tu

The channel capacity of dual-branch MRC (maximal ratio combining) diversity system over correlated waveform intensity, which is characterized as correlated-Nakagami-m fading (the power is modeled as the correlated-Gamma statistics), is evaluated in this paper. The formulas of channel capacity performance are provided with a pdf (probability density function)-based approach. The pdf of sum of Ga...

Journal: :EURASIP J. Wireless Comm. and Networking 2009
Efstathios D. Vagenas Petros Karadimas Stavros A. Kotsopoulos

This paper presents closed-form expressions for the ergodic channel capacity of SIMO (single-input and multiple output) wireless systems operating in a Nakagami-m fading channel. As the performance of SIMO channel is closely related to the diversity combining techniques, we present closed-form expressions for the capacity of maximal ratio combining (MRC), equal gain combining (EGC), selection c...

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