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Millimeter wave (mmWave) communication has been a promising technology of future fifth generation (5G) cellular networks. Due to the tremendous propagation loss of mmWave communication, device-to-device (D2D) communications are widely used over directional mmWave networks to improve the network throughput. In this paper, a new time resource sharing scheme is proposed based on Stackelberg game for...
To further increase the system capacity in cellular networks, establishing stable D2D (Device-to-Device) links with efficient power allocation is necessary due to the communication interferences. Existing works are mainly focused on the interference control and mitigation at the physical layer. However, the information from social interactions among D2D users are also helpful to improve the system...
The paper firstly analyzes the channel characteristic of the smart antennas systems based on spatial channel model(SCM), which includes the time-correlated feature, frequency-correlated feature, spatial-correlated feature and its corresponding spectral features for Suburban Macro, Urban Macro and Urban Micro. Furthermore we study the fading depth of it. At last, considerable simulations are utilized...
MIMO technology combined with OFDM has been used widely in LTE-Advanced (LTE-A) system. An adaptive switching algorithm based on a two-state Markov model using the condition number is proposed to perform the switching between spatial diversity and spatial multiplexing. Furthermore, the level crossing rates (LCR) of condition number is defined to calculate the transition probabilities. The simulation...
In this paper, we present two improved methods based on the minimize the mean square error (MMSE) to adaptively cancel the correlated and uncorrelated interference signals completely. The two methods include the eigenspace-based (ESB) adaptive interference cancellation method and projection approach (AP) for adaptive interference cancellation method. Computer simulations are provided to evaluate the...
The Luby Transform (LT) codes have been suggested as an efficient solution for multimedia communications over erasure packet network, and provide equal error protection (EEP) for all input symbols. However, for the progressive image transmission, the significant source bits are generally located ahead of the bit streams of the encoder output, which are more important for the reconstruction of the...
OFDM technology combined with STC has been used widely in modern communication systems, due to offering many advantages such as improving system capacity. Meanwhile it faces the mutual interference, such as CCI, which generated by multi-antenna transmitting at the receiver. Based on those advantages coming from the combination of STC-OFDM with WHT and the combination of STC-OFDM with ABF, an algorithm...
Intermittently connected wireless networks are a class of wireless networks that have recently attracted a lot of attention from the networking community. It is essential to understand their link connectivity performance. Some certainty incidents may lead to the link interruption in the intermittently connected wireless networks, thus we analyze these statistical properties. In this paper, we deduce...
Applying smart antennas to the communication system with FDD mode is still a difficulty which remains to be answered, due to the existing frequency difference between uplink and downlink. In this paper, downlink beam forming was implemented in terms of transmission-receiving reciprocity theorem of antennas and receiver feedback of fade parameters. According to simulation analysis, the results reveal...
In this paper, we present the joint effects of transmission channel models and the distributions of mobiles and sectoring cell configurations for co-channel interferences in Rayleigh fading environment. We presented the realistic analysis the likelihood that co-channel interference will occur in sectors in cellular communications systems with the geometrical considerations. Considering the geometrical...
In this paper, we present accurate evaluation of sector dwell time distribution based on geometric analysis methods. Considering the nature geometric characteristic of the deployed sector pattern, and the distribution of the mobiles' position and moving direction in the given sector, we derive the accurate formulas of the probability density function of sector cell dwell time. Some numerical results...
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