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This paper proposes a fast algorithm based on depth map segmentation for the depth coding of 3D video coding to reduce the coding complexity of the depth map. The proposed algorithm segments the depth map into different regions by modifying automatic thresholding technique. We also propose the search range adjustment according to the classification of the coding tree unit (CTU). The early termination...
In recent years, the use of license plate recognition technology in traffic monitor has attracted a lot of attention because it can be used in a smart city to do criminal investigation and traffic detection. License plate recognition technology has been widely used in parking lot management systems which has fixed shooting angle and lighting environments. The license plate recognition used in traffic...
This paper proposes an enhanced decision feedback equalizer (DFE) for filter bank multicarrier (FBMC) systems over offset quadrature amplitude modulation (OQAM) based on a minimal mean square error (MMSE) criterion. For each subcarrier, besides one feedforward (FF) filter and one feedback (FB) filter, we add two intercarrier interference (ICI)-suppressing filters, which feed back detected precursors...
Computation offloading, which can alleviate the restrictions of limited resources in mobile systems, has attracted much attention recently. Due to the uncertainty of channel fading and computation complexity of input/background tasks, both of communication and computation could cause the outage event of computation offloading, i.e., the computing and transmitting time exceeds a threshold. We propose...
Pointwise matches between two time series are of great importance in time series analysis, and dynamic time warping (DTW) is known to provide generally reasonable matches. There are situations where time series alignment should be invariant to scaling and offset in amplitude or where local regions of the considered time series should be strongly reflected in pointwise matches. Two different variants...
Small cell size and dense cell placement have been considered in the Long Term Evolution standard. However, small cell may result in high interference between cells. Moreover, the random geographic topology of small cell networks make them hard to analyze. In this paper, a new approach called matrix graph is proposed which is robust to interference and random topology, and takes advantage of the small...
The green communications, which focus on improving the energy efficiency, have attracted much attention from both academia and industry recently. In this paper, the tradeoff between outage probability and energy efficiency will be addressed for multi-flow cooperative communication systems with taking energy budget and devices energy consumption into consideration. The proposed approach will first...
As the growth of wireless communications is accompanied by increased energy consumption, energy-efficient communication is becoming imperative. This paper will discuss the energy efficiency of MIMO systems with antenna selection. The optimal method for the maximization of energy efficiency is exhaustive search. To address the problem, an iterative algorithm which includes the transmit antenna selection...
Spatial SQL (structured query language) is a powerful tool for systematically solving geographic problems, however, it has not been widely applied to the problem of geographic question answering. This paper introduces a parameterized approach to translate natural language geographic questions into spatial SQLs. In particular, three types of complexity are introduced and initial solutions are proposed...
In this paper, we propose a low computing complexity architecture design of 2D-to-3D image converter. The presented approach establishes database of slope pattern to analyze the 2D image. According to slope and intersection, the scheme predicts vanishing points of 2D image. Then, depth map is reconstructed using vanishing points information. This approach focuses on fundamental structure analysis...
In spectrum sharing environments of cognitive radio (CR), secondary users are permitted to share the primary user's spectrum only if limited interference to the primary user can be guaranteed. On the other hand, when multiple CR users share the same channel at one time, the total throughput of the CR networks can be maximized by allocating the common radio resource to the CR users with the best channel...
Owing to the capability of accumulating mutual information from the transmission of previous nodes, rateless codes can boost the network performance considerably, and hence have sparked much interest recently. However, how to efficiently schedule multi-hop multi-relay transmissions with the aid of rateless codes remains a challenging work. Particularly, it requires high complexity to find an optimal...
This paper presents a novel allocation scheme to solve a subcarrier and power allocation problem for multiuser SC-FDMA uplink systems with a localized subcarrier mapping mode. In the localized mode, subcarriers assigned to a user are required to be consecutive. The limitation makes the problem considered in this paper different from those of conventional multiuser OFDM systems. The proposed scheme...
Analog network coding is a promising technique which can greatly improve the transmission efficiency of wireless communications. In two-way relay systems with multiple subchannels, multiple user pairs and multiple relays, however, the optimal joint relay selection and subchannel allocation problem has not been studied in a systematic way. In this paper, a random combinatorial optimization approach,...
Spectrum sensing is the first key functionality to realize Cognitive Radios which also meet harsh performance demands under various severe conditions, e.g. the reliability and sensitivity demands under the low sensing overhead constraint. Cooperative sensing exploiting SPRT is an efficient sensing method which can significantly decrease sensing delay and sensing overhead, thereby, has been extensively...
Due to inappropriate assignment of bump pads or improper placement of I/O buffers, the configured delays of I/O signals may not satisfy the timing requirement inside die core. In this paper, the problem of timing-constrained I/O buffer placement in an area-IO flip-chip design is firstly formulated. Furthermore, an efficient two-phase approach is proposed to place I/O buffers onto feasible buffer locations...
Time selectivity of multipath channels severely degrades the performance of OFDM systems. In this paper, a piece-wise channel approximation is presented for improving the structure of the frequency-domain channel gain matrix. The proposed model is exploited to simplify the zero-forcing (ZF) equalizer as a parallel-filtering implementation with very low complexity. The linearized case of the parallel-filtering...
In this paper, a piece-wise approximation for doubly selective channel is presented for improving the structure of the frequency-domain channel gain matrix of OFDM. The proposed model is exploited to simplify the zero-forcing (ZF) equalizer, of which the linearized case is studied and applied to the DVB-H receiver design. The simulation indicates that the developed equalizer enforces considerably...
Given a set of n IO buffers and a set of n bump balls on a re-distribution routing layer, an O(n(logn)2) routability-driven partition-based IO assignment is proposed to assign n IO connections for RDL routing in a flip-chip design. Firstly, based on the recursive partition of bump balls and IO buffers, the partition-based IO assignment can be obtained by using the geometrical mapping between bump...
One of the major challenges to integrate the wireless LAN technology into portable devices is the limited battery life. The IEEE 802.11e introduced an advanced architecture to improve 802.11 power saving mechanism, named Scheduled Automatic Power Save Delivery (S-APSD). In S-APSD, the access point negotiates periodical schedules with wireless Stations (STA) to deliver buffered traffic and thus prevents...
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