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While distract interference alignment needs ideal channel state information (CSI), it is difficult to achieve in real communication system. But reality communication system possesses feedback link. Based on this, interference alignment (IA) with limited feedback was proposed. Channel coefficient matrices is quantified at receivers, and then the precoding matrix will be designed with the quantified...
In this paper, an SLNR based cascaded interference align precoding algorithm is proposed according to the study on interference suppression in downlink coordinated multipoint transmission system. In this algorithm, cascaded precoding is adopted rather than delivering channel state information (CSI) among cells to deal with inter and inner cell interference stage by stage. In the first stage, interferences...
Space shift keying (SSK) modulation is a newly emerging transmission technology for multiple-input multiple-output (MIMO) wireless systems. In this paper, we propose a novel high rate transmit diversity assisted space shift keying (HT-SSK) modulation scheme to achieve the transmit diversity gain over SSK system with high spectrum efficiency. We first apply antenna shift method at each time slot to...
Millimeter wave communication is a main solution for the high speed backhaul and ultra-high speed access transmission. This paper presented the interface-aware LDPC codes in the millimeter-wave system to support highspeed Ethernet interfaces and reduce the conversion delay. Considering constraints of the encoded codeword length of 1 G to 100 G Ethernet physical layer, LDPC (196, 120), LDPC (588, 528),...
HHVBF routing protocol is studied based on the location information and a Reliable HHVBF (RHHVBF) routing protocol is proposed in this paper. RHHVBF ensures the reliability of the entire link by ensuring the transmission reliability of each hop among the path from the source node to the destination node. We propose Node by Node Channel Evaluation Model (NNCEM) to evaluate the link between nodes, based...
A stochastic model for joint optimal congestion control and power allocation in multi-channel multi-radio wireless mesh networks is proposed. The design problem characterizes the stochastic traffic of the network data flows and the capacity of radio channels in multi-channel multi-radio wireless mesh networks as some random variables. The corresponding design problem is formulated as the stochastic...
Interference alignment (IA) effectively improves the capacity of interference channel by overlapping the interference and eliminating at the receivers. At present, most algorithms of the distributed interference alignments design precoder and receiver filter at both transmitters and receivers which causes overhead. This paper presents an improved interference alignment based on minimizing projector...
With the anticipated exponentially increasing traffic demand in future mobile networks, energy consumption becomes a significant challenge of the information and communication technology industry. Heterogeneous network (HetNet) is a promising infrastructure for both expenditure and energy saving for cellular operators and has attracted intensive research interest. In HetNets, offloading traffic from...
In order to realize green communication, we consider a cognitive radio network where the secondary user (SU) is equipped with RF energy harvesting capability. The three-state Markov chain is used to model the primary user (PU) channel, which considers both the channel occupation information of the primary network and the channel quality information. We assume that the SU cannot execute RF energy harvesting...
Feedback delay often exists in actual communication systems. Relay selection with feedback delay was based on outdated channel state information, which would seriously deteriorate the performance of cooperative communication system. In cooperative system, the best relay is selected to participate in process of information transmission, which can save system power and reduce costs. In this paper, we...
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