نتایج جستجو برای: frequency allocation

تعداد نتایج: 559665  

Journal: :Int. J. Communication Systems 2014
Shiao-Li Tsao Jiun-Jang Su Kuei-Li Huang Yung-Chien Shih Chien-Chao Tseng

Co-channel interference seriously influences the throughput of a wireless mesh network. This study proposes an end-to-end channel allocation scheme (EECAS) that extends the radio-frequency-slot method to minimize co-channel interference. The EECAS first separates the transmission and reception of packets into two channels. This scheme can then classify the state of each radio-frequency-slot as ...

2010
Irfan Ahmed Amr Mohamed Tarek Fouly Y. Charlie Hu

This article presents a concise survey of fairnessaware frequency domain resource allocation techniques in Wireless Mesh Networks (WMNs). Wireless mesh networks have emerged as a key technology for next generation application specific multi-hop wireless networks. We analyze the state-of-the-art resource allocation schemes for WMNs, providing comprehensive taxonomy of the latest work and the fut...

2008

C D & ' ; Abstract In this paper, we investigate the multiuser performance in a 2-D spreading orthogonal frequency coded division multiplexing (OFCDM) communication system over frequency and time selective fading channels. To compromise between the diversity gain and the multiple access interference (MAI), we propose an adaptive fuzzy logic to infer adequate 2-D spreading codes and to assign th...

Journal: :International Archives of Otorhinolaryngology 2014

Journal: :Wireless Personal Communications 2013
Chang-Yeong Oh Min Young Chung Hyunseung Choo Tae-Jin Lee

The interference mitigation technique based on fractional frequency reuse (FFR) provides improved cell-edge performance with similar overall cell capacity as that of systems with the frequency reuse factor of one. Furthermore, frequency sub-band allocation by FFR has the benefit of allowing flexibility for the deployment of femto-cells through frequency partitioning. Determination of a proper f...

2001
John B. Davidson Frederick J. Lallman Thomas Bundick

This paper presents the development of an integrated reconfigurable control allocation approach. This integrated approach combines frequencyapportioned control allocation with actuator failure detection and isolation. Frequency-apportioned control allocation integrates innovative control effectors with conventional aerodynamic controls and considers both the steady-state performance and frequen...

Journal: :Discrete Mathematics & Theoretical Computer Science 2011
Rafal Witkowski Janez Zerovnik

In the frequency allocation problem, we are given a cellular telephone network whose geographical coverage area is divided into cells, where phone calls are serviced by assigned frequencies, so that none of the pairs of calls emanating from the same or neighboring cells is assigned the same frequency. The problem is to use the frequencies efficiently, i.e. minimize the span of frequencies used....

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