Average level crossing rate and average fade duration of low-order maximal ratio diversity with unbalanced channels

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.

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Fade Statistic Analysis of SC in Distributed Antenna System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.336-338.1708 ◽

2013 ◽

Vol 336-338 ◽

pp. 1708-1712

Author(s):

Lei Li ◽

Xiao Dong Wang

Keyword(s):

Antenna System ◽

Multiple Antenna ◽

Level Crossing ◽

Distributed Antenna System ◽

Level Crossing Rate ◽

Composite Fading ◽

Distributed Antenna ◽

Diversity Gains ◽

Antenna Systems ◽

Average Fade Duration

Exact and closed form expressions for the average level crossing rate (LCR) and average fade duration (AFD) of the output signal envelope of selection diversity system are derived, assuming each branch is subject to independent but nonidentical composite fading in distributed antenna systems (DAS). Numerical results validate the derived expressions. It shows that DAS promise significant diversity gains over collocated multiple antenna system.

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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

WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS ◽

10.37394/23201.2021.20.15 ◽

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.

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