Interference Suppression Scheme for Time Division Duplex CSMA based on Prerake Combining Diversity 


Vol. 27,  No. 5, pp. 417-424, May  2002


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  Abstract

For an efficient operation of the third generation mobile communication system, an enhanced multiple access control to accommodate the inherent asymmetry of mobile multimedia traffic is required. The Time Division Duplex(TDD) CDMA with variable time slot allocation scheme is known to be quite efficient in this situation. However, since both uplink and downlink share the same frequency in TDD CDMA system, the uplink and downlink signals can interference each other and these interferences cause capacity reduction of system performance. In TDD CDMA system, since a channel impulse response of downlink is very similar to that of uplink for a period of time, it is possible to apply to prerake diversity. The system using prerake diversity can have an effect of reduction of TDD interference on any path, since the transmission power of a signal is distributed timely prior to the signal transmission. In this paper, a new interference suppression scheme is proposed based on prerake combining diversity in TDD CDMA system and the remaining capacity of proposed system is approximately 2 times better than that of conventional system regardless of the number of interference slot from neighbor cell.

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  Cite this article

[IEEE Style]

S. Park and N. Kim, "Interference Suppression Scheme for Time Division Duplex CSMA based on Prerake Combining Diversity," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 5, pp. 417-424, 2002. DOI: .

[ACM Style]

Soyoung Park and Nak-Myeong Kim. 2002. Interference Suppression Scheme for Time Division Duplex CSMA based on Prerake Combining Diversity. The Journal of Korean Institute of Communications and Information Sciences, 27, 5, (2002), 417-424. DOI: .

[KICS Style]

Soyoung Park and Nak-Myeong Kim, "Interference Suppression Scheme for Time Division Duplex CSMA based on Prerake Combining Diversity," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 5, pp. 417-424, 5. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880