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The communication system based on the faster-than-Nyquist (FTN) signaling is a bandwidth-efficient technology which has drawn much attention recently. Since FTN uses faster symbol rate than Nyquist signaling, inter-symbol interference (ISI) is generated inevitably in the receiver. Partial Decision Feedback Equalization (PDFE) cancellation is an efficient interference cancellation and signal detection...
A novel direction finding method called Toeplitz matrix reconstruction-based orthonormal propagator method (TMR-OPM) is proposed for narrowband coherent signals impinging on a uniform linear array (ULA). In the proposed method, the coherency of incident signals is firstly decor related through reconstructing a Hermitian Toeplitz matrix formed from fourth-order cumulants (FOC). And in Gaussian noise...
An energy-efficient co-scheduling policy for packet receiving and video decoding tasks is proposed for a mobile terminal receiving video streaming packets from a access point(AP) in a WLAN. Through analyzing the interaction between the network interface card(NIC) and the CPU, a frame buffer between the NIC and the CPU is set to facilitate the cooperation of video packet receiving and video decoding...
Sphere detection and Ordered Successive Interference Cancellation (OSIC) technologies are the most important techniques in multiple input multiple output (MIMO) detection. In this paper, a hierarchical MIMO detection technology which combines OSIC with K-Best SE algorithm is proposed. The proposed algorithm distributes layers into the two detect techniques and adjusts the ratio based on Channel Gain...
As one of the key technical challenges in long term evolution (LTE)-Advanced heterogeneous networks (HetNets) is intercell interference coordination, many different schemes, such as coordinated multipoint (CoMP) and almost blank subframe (ABS) schemes, have been proposed in this field. Different cells are pushed to cooperate to eliminate intercell interference in CoMP coordinated beamforming, but...
This paper presents an efficient method for calculating the Precoding Matrix Indicator (PMI) at a Long Term Evolution (LTE) User Equipment (UE). To solve problem of the high computational complexity in selection algorithm of precoding codebook for TDD LTE. A new selection algorithm based on singular value decomposition of channel matrix is presented. Our method reduces the computational complexity...
This paper presents an novel iterative generalized selection combining (IGSC) for amplify-and-forward (AF) cooperative communications based on error detection and rearranging the SNR of indirect link in decreasing order of magnitude. The destination node decides whether to accept incoming path or not in every time frame to reduce the excessive burden of maximal ratio combining (MRC) with all diversity...
We consider a cognitive radio network in which a set of base stations make opportunistic spectrum access to support wireless subscribers within their covering cells. The spectrum of interest is divided into independent channels licensed to the primary users. Channel assignment and power control must be carried out in the cognitive network so that no excessive interference is caused to the primary...
The development of the IEEE 802.16 mobile broadband wireless access or WiMAX standards promises to usher the next generation of mobile wireless networks. There is considerable ongoing interest in evaluating the performance of such networks with simulations forming the primary tool for conducting such studies. This paper presents the design and implementation of the Medium Access Control (MAC) and...
This paper presents a performance analysis of vector orthogonal frequency division multiplexing (VOFDM) in multipath fading channel to investigate its diversity gain, performance limitation and the choice of dimension in the vector block for the design of a low-complexity receiver. Based on the analytically derivation, it is first verified that VOFDM can realize the maximum diversity gain while the...
We propose in this paper a practical adaptive modulation and channel encoding scheme for spatial multiplexing multiple-input multiple-output (MIMO) systems. The proposed scheme aims not only to maximize the average spectral efficiency (ASE) for a given bit error rate (BER) constraint but also to lower the computational and hardware complexity. First, an adaptive transmission principle for spatial...
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