New Results and Applications about the Level Crossing Rate of SC Receiver output Signal in the Presence of Gamma Shadowing and k-μ or Rician Multipath Fading

2021 ◽  
Vol 20 ◽  
pp. 118-127
Author(s):  
DRAGANA KRSTIĆ ◽  
SUAD SULJOVIĆ ◽  
MIHAJLO STEFANOVIĆ ◽  
MUNEER MASADEH BANI YASSEIN ◽  
DANIJELA ALEKSIĆ
Keyword(s):  
Output Signal ◽  
Joint Probability ◽  
Multipath Fading ◽  
Average Level ◽  
Rician Fading ◽  
Level Crossing ◽  
Multipath Fading Channel ◽  
Signal Envelope ◽  
Level Crossing Rate ◽  
Severity Parameter

In this paper,the wireless communication system with dual SC receiver operating over shadowed multipath fading channel is considered. The multipath fadingis k-μor Rician.The received signal experiences the short term fading which is resulting in SC receiver envelope variation and Gamma long term fading resulting in SC receiver envelope power variation. The closed form expressions for joint probability density functions of SC receiver output signal envelope and their first derivative of SC receiver output signal envelope are calculated for both, k-μand Rician fading. These expressions are used for evaluation of average level crossing rate of SC receiver output signal envelopes. The numerical expressions are plotted to show the effect of Rician fading severity parameter and Gamma shadowing severity parameter on the average level crossing rate of SC receiver output signal envelope.

scholarly journals LEVEL CROSSING RATE OF MACRODIVERSITY OUTPUT PROCESS IN THE PRESENCE OF η-μ SHORT TERM FADING AND GAMMA LONG TERM FADING

2017 ◽  
Vol 16 (2) ◽  
pp. 157
Author(s):  
Srđan Milosavljević ◽  
Dejan Milić ◽  
Slaviša Trajković ◽  
Petar Spalević ◽  
Bojana Milosavljević
Keyword(s):  
Multipath Fading ◽  
Selection Combining ◽  
Output Process ◽  
Level Crossing ◽  
Short Term ◽  
Signal Process ◽  
Multipath Fading Channel ◽  
Level Crossing Rate ◽  
Severity Parameter

In this paper macrodiversity reception with macrodiversity selection combining (SC) receiver and two microdiversity MRC receivers operating over shadowed multipath fading channel is studied. Received signal experiences  short term fading and correlated Gamma long term fading resulting in system performance degradation. Level crossing rate (LCR) of η-μ random process and level crossing rate of signals at outputs of microdiversity MRC receivers are efficiently calculated. By using these derived formulas, level crossing rate of macrodiversity SC receiver output signal process is calculated. By using this result, average fade duration (AFD) of the proposed wireless communication system can be calculated. The influence of  η-μ  short term fading severity parameter, Gamma long term fading severity parameter and Gamma long term correlation coefficient on level crossing rate is analysed and studied.

scholarly journals Second order statistics of SC receiver over k-μ multipath fading channel

2014 ◽  
Vol 11 (3) ◽  
pp. 391-401 ◽  
Author(s):  
Milos Bandjur ◽  
Dragan Radenkovic ◽  
Vladeta Milenkovic ◽  
Suad Suljevic ◽  
Danijel Djosic
Keyword(s):  
Fading Channel ◽  
Multipath Fading ◽  
Average Level ◽  
Selection Combining ◽  
Level Crossing ◽  
Multipath Fading Channel ◽  
Second Order Statistics ◽  
Level Crossing Rate ◽  
Diversity Receiver ◽  
Average Fade Duration

In this paper wireless communication system with dual branch selection combining (SC) diversity receiver operating over k-? multipath fading environment is considered. Closed form expressions for average level crossing rate of SC receiver output signal envelope and average fade duration of proposed system are evaluated. Numerical results are presented graphically to show the influence of Rican factor k and fading severity ? on average level crossing rate and average fade duration.

Average Level Crossing Rate of Dual Selection Diversity in Correlated Rician Fading with Rayleigh Cochannel Interference

2010 ◽  
Vol 14 (7) ◽  
pp. 605-607 ◽  
Author(s):  
Aleksandra S. Panajotovic ◽  
Mihajlo C. Stefanovic ◽  
Dragan Lj Draca ◽  
Nikola M. Sekulovic
Keyword(s):  
Cochannel Interference ◽  
Average Level ◽  
Rician Fading ◽  
Level Crossing ◽  
Selection Diversity ◽  
Level Crossing Rate

scholarly journals LCR of SC receiver output signal over α-κ-μ multipath fading channels

2016 ◽  
Vol 29 (2) ◽  
pp. 261-268 ◽  
Author(s):  
Suad Suljovic ◽  
Dejan Milic ◽  
Stefan Panic
Keyword(s):  
Fading Channels ◽  
Output Signal ◽  
Multipath Fading ◽  
Selection Combining ◽  
Multipath Fading Channels ◽  
Signal Envelope ◽  
Transmission Parameters ◽  
Dominant Component ◽  
Level Crossing Rate ◽  
Wireless Mobile Communication

Wireless mobile communication system with selection combining (SC) diversity receiver is investigated in this paper. Received signal envelope experiences ?-?-? short term fading resulting in system performance degradation. Level crossing rate (LCR) and average fade duration (AFD) of SC receiver output signal envelope are obtained as rapidly converging infinite series expressions. Numerically evaluated results are presented graphically, in order to discuss the effects of transmission parameters: multipath fading severity, dominant component power and nonlinearity propagation parameter on observed LCR performance of dual SC.

scholarly journals APPLICATION OF LAPLACE APPROXIMATION FORMULA IN PERFORMANCE ANALYSIS OF WIRELESS RELAY COMMUNICATION SYSTEM IN MULTIPATH FADING ENVIRONMENT

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
ČASLAV STEFANOVIĆ
Keyword(s):  
Performance Analysis ◽  
Communication System ◽  
Multipath Fading ◽  
Laplace Approximation ◽  
Average Level ◽  
Approximation Formula ◽  
Level Crossing ◽  
Relay Communications ◽  
Level Crossing Rate ◽  
Wireless Mobile Communication

In this paper, Laplace approximation formula is efficiently used to calculate infinite-series expression for average level crossing rate (LCR) of the product of Nakagami-m and kappa-mu random processes. The results can be used in performance analysis of dual-hop relay wireless mobile communication system in specific multipath fading environment when the first section is under the influence of NLOS multipath environment while the second section is under the influence of LOS multipath fading environment. The influences of multipath fading parameters on the LCR of the proposed model are examined, graphically presented and discussed. Moreover, analytical approach of applying Laplace approximation formula in multi-hop systems is further considered by obtaining closed form expressions for the LCR of the product of three and four Nakagami-m processes, respectively. Key words: average level crossing rate, kappa-mu multipath fading, Laplace approximation formula, Nakagami-m distribution, relay communications system.

scholarly journals Moments Of Microdiversity EGC Receivers And Macrodiversity SC Receiver Output Signal Over Gamma Shadowed Nakagami–m Multipath Fading Channel

2015 ◽  
Vol 66 (6) ◽  
pp. 348-351
Author(s):  
Nebojša Djordjević ◽  
Branimir S. Jaksić ◽  
Ana Matović ◽  
Marija Matović ◽  
Marko Smilić
Keyword(s):  
Closed Form ◽  
Output Signal ◽  
Fading Channel ◽  
Multipath Fading ◽  
Selection Combining ◽  
Signal Power ◽  
Equal Gain Combining ◽  
Multipath Fading Channel ◽  
Signal Envelope ◽  
System Output

Abstract A system with macrodiversity selection combining (SC) receiver and for microdiversity equal gain combining (EGC) receivers is considered. Received signal is subjected, simultaneously to multipath fading and shadowing, resulting in signal envelope and signal power variation. Closed form expressions for moments of macrodiversity SC receiver output signal envelope are calculated. Numerical expressions are plotted to present the influences of Gamma shadowing severity and Nakagami-m severity on moments of proposed system output signal.

scholarly journals Performance of macro diversity wireless communication system operating in Weibull multipath fading environment

2017 ◽  
Vol 30 (4) ◽  
pp. 599-609
Author(s):  
Suad Suljovic ◽  
Dejan Milic ◽  
Zorica Nikolic ◽  
Stefan Panic ◽  
Mihajlo Stefanovic ◽  
...  
Keyword(s):  
Communication System ◽  
Output Signal ◽  
System Performance ◽  
Multipath Fading ◽  
Cumulative Distribution ◽  
Selection Combining ◽  
Small Scale ◽  
Weibull Fading ◽  
Fading Parameter ◽  
Severity Parameter

In this paper, we consider wireless mobile radio communication system with macro diversity reception. Signal is subject to Weibull small scale fading and Gamma large scale fading resulting in system performance degradation. Receiver uses macro diversity selection combining (SC) technique in order to reduce the impact of long term fading effects, and two micro diversity SC branches are used to mitigate Weibull short term fading effects on system performance. Probability density function (PDF), and cumulative distribution function (CDF), as well as level crossing rate (LCR) and average fade duration (AFD) of the SC receiver output signal envelope are evaluated. The obtained expressions converge rapidly for all considered values of Weibull fading parameter and Gamma shadowing severity parameter. Mathematical results are studied in order to analyze the influence of Weibull fading parameter and Gamma shadowing severity parameter on statistical properties of the SC receiver output signal.

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