• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.8
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• pp.1587-1592
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• 2012

Analysis on co-use parameters in TV frequency channels is essential to utilize a TV White Space(TVWS) efficiently. A transmission probability of interfering transmitter can be used as some criteria for performance evaluation of the systems that co-use the cochannels. We considered a duty cycle as a parameter for getting the method how heterogeneous systems can use simultaneously a co-channel in TVWS. We analyze the transmission probability of interfering transmitter with an assumption that the probability is the same as the duty cycle, a time that it spends in an active state as a fraction of the total under consideration. In order to make an analysis of relationship between duty cycle and performances of two systems. We take into consideration on the case that WLAN is an victim receiver and WiBro is a interfering transmitter. Analyzed coexistence results may be widely applied into the technique developed to get the coexisting condition for wireless devices using many communication protocols in same frequency.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.12
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• pp.2505-2510
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• 2011

In this paper, we consider to obtain the criteria for maximal power of interfering transmitter according to distance between WiBro and WLAN in TVWS. We analyze this criteria as a parameter for co-use when hetero systems share the same frequency channels. In order to make an analysis of relationship between distance and power of two systems, we take into consideration on two cases. First, WiBro is an interfering transmitter and WLAN is a victim receiver. Second, WLAN is an interfering transmitter and WiBro is a victim receiver. Analyzed coexistence results under various co-use scenarios may be widely applied into the technique developed to get the coexisting condition for wireless devices using many communication protocols in same frequency.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.2
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• pp.222-227
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• 2012

In this paper, we analyze the total performance according to duty cycle of interfering transmitter in hetero systems. We analyze this criteria as a parameter for co-use when hetero systems share the same frequency channels. In order to make an analysis of relationship between duty cycle and performances of two systems. We take into consideration on the case that WiBro is an victim receiver and WLAN is a interfering transmitter. Analyzed coexistence results may be widely applied into the technique developed to get the coexisting condition for wireless devices using many communication protocols in same frequency.