Correlated shadowing and near-far effects on throughput of slotted ALOHA in Nakagami fading environment

Abdel-Hafez, Mohammed; Safak, M.

doi:10.1109/melcon.1998.699310

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…After obtaining the capture probability for given number of MAI and CCI packets, or , we can get the average capture probability as (22) for the case of synchronized cochannel cells and (23) for the case of asynchronous cochannel cells, where the mass functions , and is determined by the traffic characteristics. In this section, we are to derive the mass functions of and .…”

Section: Packet Throughputmentioning

confidence: 99%

“…With the expressions of the distributions of and , (24) and (25) [or (29)], as well as the conditional capture probability (12) [or (18)] obtained in the previous sections, we can compute the packet capture probability according to (22); and the result can be used to evaluate the system throughput.…”

Section: B Asynchronous Cochannel Cellsmentioning

confidence: 99%

“…MAI and synchronized CCI. Four sets of fading parameters as shown in the title of each subfigure are computed; the average power of the CCI packets are set to be 10 dB below the test packet and the MAI packets = = 10; three capture margins are computed; the theoretic results are obtained through numerical evaluation of (12),(24),(25), and(22) and simulation results are obtained by Monte Carlo simulation of (3) and(8).…”

mentioning

confidence: 99%

“…The same fading parameter setup asFig. 4are used except CCI packets are asynchronous; the theoretic results are obtained through numerical evaluation of (18), (24), (29), and(22) and simulation results are obtained by Monte Carlo simulation of (4) and(13).…”

mentioning

confidence: 99%

See 3 more Smart Citations

Investigation of slotted aloha under nakagami fading with synchronized and asynchronous cochannel cells

Zhou

Yao

Heffes

et al. 2003

IEEE Trans. Veh. Technol.

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The throughput performance of slotted ALOHA (S-ALOHA) in a cellular system and Nakagami fading environment is studied. Based on the signal capture model, the effects of the multiple access interference (MAI) from in-cell users and the cochannel interference (CCI) from cochannel cells are quantified analytically. Especially considered are the cases when asynchronism of cochannel cells is present, for which an approximation of the interference distribution is successfully applied to get a highly precise expression of the system throughput. Our study shows that though the MAI level and capture effect determine the basic behavior of the S-ALOHA, CCI significantly reduces the throughput of S-ALOHA and asynchronous CCI introduces an especially severe impairment. Our analytical framework is also able to incorporate additional channel conditions and system parameters like lognormal shadowing and the cellular cluster size.

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Section: Packet Throughputmentioning

confidence: 99%