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The causes of delays in the control circuit of UAV are considered. The necessity of taking into high-speed performance, memory and capacity of digital hardware facilities, realizing the system of autonomous remote control is substantiated.
In this paper we present an approach to provide efficient low-complexity video encoding for wireless sensor networks. We present a method based on removing the most time-consuming task, that is motion estimation, from the encoder. Instead the decoder will perform motion prediction based on the available decoded frame and send the predicted motion vectors to the encoder. We present results based on...
In a circuit with enhanced-scan, any two-pattern test can be applied to detect delay faults. However, the tests may deviate substantially from functional operation conditions, and result in overtesting. Functional broadside tests create functional operation conditions during their functional clock cycles by using reachable states as scan-in states. To maintain a proximity to functional operation conditions...
Applying appropriate minimum leakage vector (MLV) to each RTL module instance results in a low leakage state with significant area overhead. For each RTL module, via Monte Carlo simulation, we identify a set of MLV intervals such that maximum leakage is within (say) 10% of the lowest known leakage. We can reduce area overhead by choosing PI MLVs such that resultant inputs to internal nodes are also...
3D imaging capable devices have been available on the market for a few years now and the availability of 3D contents is also picking up. However, 3D contents available for viewing is not growing fast enough to meet the demand. To compensate for such a problem, most 3D imaging devices are equipped with 2D to 3D conversion function. Also, common 3D contents available are mostly produced with 2 view...
This paper describes an n-detection test generation strategy for mixed test sets, which consist of both broadside and skewed-load tests, targeting transition faults. The strategy consists of a test generation procedure without test compaction heuristics and a static test compaction procedure. The test generation procedure decides, every time a fault is targeted, whether to generate a broadside or...
In the paper a novel method for passive fractional delay filter design based on the distributed maximal flatness method is presented. The proposed approach is based on the design method of the one of the most commonly used fractional delay filters - the maximally flat filter. This filter demonstrates the excellent performance only in a relatively narrow frequency range around zero frequency but it...
Abstract-this paper presents an interest - based mobility model in order to portray the social property of opportunistic networks. In this model, mobile node and the geographical area is assigned to a multi-dimensional interest vector, and the probability of a region is selected as the moving target by a node is related with the inner product of two interest vectors and geographical distance between...
In this paper, the influence of feedback channel delay on system throughput of the cooperative multi-cell system with adaptive beamforming selection is discussed. On the one hand, multi-cell cooperative processing (MCP) has the potential to boost spectral efficiency and improve fairness among users. However, the traditional centralized multi-cell cooperative scheme, where a central processing unit...
Underwater acoustic (UWA) channels are wideband in nature due to the small ratio of the carrier frequency to the signal bandwidth, which introduces frequency dependent on Doppler spread. Compressed Sensing (CS) offers a method to solve the channel estimation problems for an UWA system, based on the existence of a sparse representation of the treated signal and an over-complete dictionary with a set...
Delay Tolerant Mobile Sensor Networks (DTMSN) has the enormous potential to expand its applications in many previously impossible fields. Because of its intermittent link and limited network resources, this network needs an effective data forwarding algorithm to ensure valid data forwarding and highly delivery ratio. Recent approaches have drawbacks of computing nodes' delivery probability, because...
Mobility of terminals would bring changes of network topology. In dense VANET multi-hop communication with nodes of high speed, a problem how to choose a next hop relay rapidly made a significant sense. In this paper, a slot assignment for voice access named Black-burst scheme based TDMA was proposed for channel access contention. The problem of relay selection could be solved as a method of voice...
Integrated Circuit(IC) design has seen a revolutionary progress in the past two decades with shrinking sizes of VLSI fabrication processes. This has an advantage of fabricating millions of transistors in a single chip IC. On the other hand it also creates many challenges in Deep Sub-Micron (DSM) technologies. One of the greatest challenges in DSM designs is inter-wire cross talk, which becomes significant...
As a result of supply voltage reduction and process variations effects, the error free margin for dynamic voltage scaling has been drastically reduced. This paper presents an error aware model for arithmetic and logic circuits that accurately and rapidly estimates the propagation delays of the output bits in a digital block operating under voltage scaling to identify circuit-level failures (timing...
We consider the problem of reducing delays in block transmissions of packets over multicast erasure channels in heterogeneous networks using relay stations. The macro base station performs random linear network coding over a block of packets which are relayed to the relay station which broadcasts the packets to the users. We propose a fluid approximation to our problem, and obtain the optimal solution...
This paper studies the capacity performance of coordinated multi-point (CoMP) downlink transmissions based on limited feedback. We consider both path loss effects and channel imperfections including feedback delay and quantization error. Closed-form expressions are derived to characterize ergodic achievable rates for joint processing (JP) and coordinated beamforming (CBF) techniques, respectively...
Coordinated multi-point (CoMP) transmission is considered as an efficient technique to improve cell-edge performance as well as system spectrum efficiency. In CoMP-enabled systems, a cluster of coordinated base stations (BSs) are typically assumed to be connected to a control unit (CU) via backhaul links, and the provided performance gain relies heavily on the quality of the channel state information...
In this paper, we analyze the effects of imperfect channel state information (CSI) on the outage performance of linear zero-forcing (ZF) receiver in time-varying multiple-input multiple-output (MIMO) fading channels. Accurate CSI is an essential condition to improve the overall performance of the rate-adaptive MIMO system. However, acquiring perfect CSI at transceivers is impossible due to feedback...
In this paper, we examine the performance of multiple-input multiple-output (MIMO) cognitive amplify-and-forward (AF) relay systems with maximum ratio transmission (MRT). In particular, closed-form expressions in terms of a tight upper bound for outage probability (OP) and symbol error rate (SER) of the system are derived when considering channel estimation error (CEE) and feedback delay (FD) in our...
The Stored Unibit Transfer (SUT) encoding has been recently proposed as a redundant high-radix encoding for each of the channels of a Residue Number System (RNS) that can improve the efficiency of Binary Signed Digit (BSD)-encoded RNS. However, a residue-to-binary (reverse) converter for it has not yet been reported in the open literature. In this paper we introduce SUT-RNS reverse converters for...
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