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The new generation of wireless communication systems demands high system capacity and energy efficiency. As an important candidate technology, fixed relays are able to improve the system capacity and energy efficiency. In this paper, considering uplink data transmission in a single cell, we address the problem of joint optimization of the Positions of Relay stations (PR) and the serving Range of Relay...
In this paper, we study the performance of joint spatial-temporal spectrum sensing based cognitive radio networks (CRNs). The relationship between spatial spectrum sensing and temporal spectrum sensing under the interference constraint of primary user is investigated. Both the spectrum sensing performance and throughput of secondary system is related to sensing duration, and we argue that there exists...
Joint transmission (JT) is a promising coordinated multipoint (CoMP) transmission scheme for achieving high downlink capacities in wireless cellular networks of next generation. In this paper, an adaptive scheme, named as partial JT CoMP is presented. This scheme improves the network throughput by dynamically adjusting points involving in jointly transmitting according to the instantaneous channel...
The Feher quadrature phase shift keying (FQPSK) modulation based Physical-layer Network Coding (PNC) is investigated in this paper, by which the nonlinear distortion effects resulted from the high power amplifier (HPA) in the system can be avoided. In our presented framework, a novel remapping rule for the FQPSK modulation in the PNC system is proposed to make a better bit error rate (BER) performance...
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