Results 41 to 50 of about 765,447 (285)
Hardware and software design of BMW system for multi-floor localization
EURASIP Journal on Wireless Communications and Networking, 2017 Although the Micro Electro Mechanical System (MEMS) sensors are capable of providing short-term high positioning accuracy, every positioning result significantly depends on the historical ones, which inevitably leads to the long-term error accumulation ...
Mu Zhou +3 more
doaj +1 more source
Soft metrics and their Performance Analysis for Optimal Data Detection in the Presence of Strong Oscillator Phase Noise [PDF]
, 2013 In this paper, we address the classical problem of maximum-likelihood (ML) detection of data in the presence of random phase noise. We consider a system, where the random phase noise affecting the received signal is first compensated by a tracker ...
Eriksson, Thomas +3 more
core +2 more sources
Unified scaling of polar codes: Error exponent, scaling exponent, moderate deviations, and error floors [PDF]
2015 IEEE International Symposium on Information Theory (ISIT), 2015 Consider the transmission of a polar code of block length $N$ and rate $R$ over a binary memoryless symmetric channel $W$ and let $P_e$ be the block error probability under successive cancellation decoding. In this paper, we develop new bounds that characterize the relationship of the parameters $R$, $N$, $P_e$, and the quality of the channel $W ...
Marco Mondelli +2 more
openaire +2 more sources
A Monocular Vision Sensor-Based Obstacle Detection Algorithm for Autonomous Robots
Sensors, 2016 This paper presents a monocular vision sensor-based obstacle detection algorithm for autonomous robots. Each individual image pixel at the bottom region of interest is labeled as belonging either to an obstacle or the floor.
Tae-Jae Lee +2 more
doaj +1 more source
Can Punctured Rate-1/2 Turbo Codes Achieve a Lower Error Floor than their Rate-1/3 Parent Codes?
, 2007 In this paper we concentrate on rate-1/3 systematic parallel concatenated convolutional codes and their rate-1/2 punctured child codes. Assuming maximum-likelihood decoding over an additive white Gaussian channel, we demonstrate that a rate-1/2 non ...
Carrasco, R. +3 more
core +2 more sources
Sensors, 2020 This paper faces the issue of changing the received signal strength (RSS) from an observed access point (AP). Such a change can reduce the Quality of Service (QoS) of a Wi-Fi-based Indoor Localisation System. We have proposed a dynamic system based on an
Marcin Luckner, Rafał Górak
doaj +1 more source
Lowering the Error Floor of LDPC Codes Using Cyclic Liftings
, 2010 Cyclic liftings are proposed to lower the error floor of low-density parity-check (LDPC) codes. The liftings are designed to eliminate dominant trapping sets of the base code by removing the short cycles which form the trapping sets.
Ahmadian-Attari, Mahmoud +2 more
core +1 more source
Differential Amplify-and-Forward Relaying in Time-Varying Rayleigh Fading Channels [PDF]
, 2013 This paper considers the performance of differential amplify-and-forward (D-AF) relaying over time-varying Rayleigh fading channels. Using the auto-regressive time-series model to characterize the time-varying nature of the wireless channels, new weights
Avendi, M. R., Nguyen, Ha H.
core +1 more source
Low Error Floor Concatenated LDPC for MIMO Systems [PDF]
International Journal of Advanced Computer Science and Applications, 2017 Multiple-Input and Multiple-Output, or MIMO is the use of multiple antennas at both the transmitter and receiver to improve communication performance. MIMO technology has attracted attention in wireless communications; because it offers significant increases in data throughput and spectral efficiency without additional bandwidth or increased transmit ...
Lamia Berriche, Areej Al
openaire +1 more source
FEBS Open Bio, EarlyView.Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley +1 more source