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The distortion by using traditional video encoders (e.g. H.264) on the depth discontinuity can introduce disturbing effects on the synthesized view. The proposed scheme aims at preserving the most significant depth transition for a better view synthesis. Furthermore, it has a scalable structure. The scheme extracts edge contours from a depth image and represents them by chain code. The chain code...
This paper proposes the application of the stochastic decoding approach for joint decoding of Low-Density Parity-Check (LDPC) codes and Partial-Response (PR) channels. It shows how the computationally-intensive operations required in the PR channel detection can be performed using simple circuitry in the stochastic domain. Performance results of the stochastic approach are compared against conventional...
Channel estimation is a crucial task for the overall communication performance of a wireless receiver. Compared to traditional approaches the estimation of the wireless channel can be improved by using iterative estimation with feedback from other receiver components, however the VLSI implementation of such iterative channel estimation in multiple-input multiple-output (MIMO) orthogonal frequency...
The Maximum Likelihood (ML) detector is a detection criteria which yields an optimal solution to Multiple-Input Multiple-Output (MIMO) systems but however, at the expense of its NP-hard complexity. Instead, the Sphere Decoder (SD) was proposed as an efficient algorithm for finding the solution to the ML detection problem in MIMO digital communication systems. Unlike the ML detector whose complexity...
Various OSIC MIMO detectors are considered suboptimal in terms of performance and complexity, however suffers from error propagation. QR-LRL is considered to be most effective to mitigate error performance as it detects the least reliable layer(LRL) symbol first. It achieves hard ML performance, but suffers from empty vector set(EVS) problem for soft output generation. Some of the previous work mitigates...
This paper presents an optimized architecture for a first-one detector (FOD) using a uniform partition decoding scheme based on the statistical distribution of the input code words. The proposed architecture uses a conventional method to optimize the Boolean expression of the input code words. Experimental results show that the proposed approach covers only 58 gates in a 0.25 m CMOS technology. Based...
Binary Translation technology is used to convert binary code of one Instruction Set Architecture (ISA) into another. This technology can solve the software-inheritance problem and ISA-compatibility between different computers architecture. In this paper, we describe BTMD (Binary Translation based Malcode Detector), a novel framework that exploits static and dynamic binary translation features to detect...
Channel estimation is a crucial task for the overall communication performance of a wireless receiver. Compared to traditional approaches the estimation of the wireless channel can be improved by using iterative estimation with feedback from other receiver components, however the VLSI implementation of such iterative channel estimation in multiple-input multiple-output (MIMO) orthogonal frequency...
Iterative detection and decoding (IDD), combined with spatial-multiplexing multiple-input multiple-output (MIMO) transmission, is a key technique to improve spectral efficiency in wireless communications. In this paper we present the — to the best of our knowledge — first complete silicon implementation of a MIMO IDD receiver. MIMO detection is performed by a multi-core sphere decoder supporting up...
In this paper, the early-termination fixed-complexity sphere detector (ET-FSD) that is a channel-adaptive version of FSD, is developed to exploit scale effects for the multiple-antenna system which has to detect signals of multiple users under the constraint of sum complexity (e.g., the base-station systems always encounter the run-time limit of signal detection of all the users). In order to apply...
In this paper, a compressive sampling (CS) based multiple symbol differential detector is proposed, using the principle of a generalized likelihood ratio test (GLRT). The proposed detector works on the compressed samples directly, thereby avoiding the reconstruction step and thus resulting in a reduced implementation complexity along with a reduced sampling rate (much below the Nyquist rate). We also...
Recently, a turbo-coded noncoherent space-time modulation scheme, which is aimed at providing both a high data transmission rate and a low receiving complexity, was proposed for noncoherent block fading channels. However, in cases where a large number of transmit antennas exist, the turbo code does not match well with the noncoherent space-time modulation scheme, and results in performance degradation...
The purpose of thiswork is to detect any infrared handheld remote control signals for all push buttons then use these detected signals for different applications. All the packet forms which transmitted from IR remote control have been introduced and measured in details using IR detector circuit and storage oscilloscope. IR remote control signal decoder and detector is implemented using microcontroller...
Femtocells, which are low cost low power, stand alone cellular access points, are a potential solution to provide good indoor coverage with high data rate. However, the femtocell deployment may also increase the co-channel interference (CCI) by reducing the distance reuse of the spectrum. In this paper, we introduce methods to cancel out the interference among the femtocells while considering that...
In current and future wireless standards, such as WiMAX, 3GPP-LTE or LTE-Advanced, receiver terminals have to support numerous operating modes for each protocol [1], as well as sophisticated transmission techniques, especially enhanced MIMO detection and iterative forward error correction (FEC). MIMO detection and FEC belong to the most computationally complex parts of the receiver-side baseband signal...
There are many studies on the performance of binary fingerprinting codes under a well-known marking assumption. Among many fingerprinting codes, we focus on Tardos codes and Nuida's variants. From the signal processing point of view, the relaxation of the assumption is required for the analysis. In this paper, we consider the averaging attack which has been studied in the spread-spectrum-based fingerprinting...
We propose a low-complexity turbo equalizer consisting of a sliding window MAP estimator, and a low overhead LDPC decoder. By utilizing 2nd order statistics, we obtain 2.5–4dB gain with additional improvement with turbo loop.
In this paper turbo multi-user detection (MUD) technique is proposed for multi carrier code division multiple access (MC-CDMA) system to overcome the affects of multiple access interference (MAI) caused by the inter-cell and intra-cell interference and near far effect. The proposed technique estimates the interference from the unknown users and the interference estimate is subtracted from the received...
Our developed solution of intelligent audio surveillance systems is based on modified Viterbi decoder customized for long-term audio-events monitoring application. The classical Viterbi decoder evaluates the hypothesis after detecting the end of the event (utterance) in the front-end module. The end of the event is usually detected using UBM (Universal Background Model) or relative entropy or energy...
Various dataflow formalisms have been used for capturing the potential parallelism in streaming applications to realise distributed (multi-core) implementations as well as for analysing key properties like absence of deadlock, throughput and buffer occupancies. The recently introduced formalism of Scenario-Aware Dataflow (SADF) advances these abilities by appropriately capturing the dynamism in modern...
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