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While maintaining a quality of cellular link subject to underlay device-to-device (D2D) communication in the cellular system, it obvious that a performance of proximity-based service over D2D link would be varying with the location of its transmitter. We consider an open-loop fractional power control for the uplink cellular link while limiting the transmit power of D2D link so as to protect the cellular...
In this paper, we analyze the outage performance of relay-enhanced cellular systems in an interference-limited environment, where the co-channel interference (CCI) is a crucial factor that governs the overall system performance as compared to an AWGN (additive white Gaussian noise). Furthermore, the relay station and destination are subject to the different but arbitrary number of CCIs on each node...
In this paper, we consider a dual carrier modulation (DCM) which is employed in multi-band orthogonal frequency multiplexing (OFDM) ultra wide-band (UWB) system. DCM transforms two QPSK symbols to two 16-QAM symbols with different bit-to-symbol mappings. We find that the basic idea of DCM is the same as that of the rotation code. More specifically, both the rotation code and DCM can provide not only...
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