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A prior paper introduced the waveform denoted GMSK/PN as a candidate for power-limited, single-access communications links on which simultaneous high data rate transmission and precision ranging are desired. The waveform combines traditional GMSK (Gaussian Minimum-Shift Keying) modulation and a PN (pseudonoise) spread-spectrum sequence used for ranging. A ranging code is placed on a subcarrier whose...
International Workshop Agreement 3 organized by the International Standard Organization calls for more research to determine simple objective ways to assess susceptibility to visually induce motion sickness (VIMS) without making viewers sick (So and Ujike, 2010). This study examines the use of measurable optokinetic afternystagmus (OKAN) parameters to predict susceptibility to VIMS. Eighteen participants...
Initial ranging (IR) involves detecting the binary phase shift keying (BPSK) code transmitted by the new subscriber station (SS). In this paper, we formulate a simple detector using the Neyman-Pearson theorem (NPT) for single-code detection in IEEE 802.16-compliant time division duplex (TDD) orthogonal frequency division multiple access (OFDMA) systems. Exploiting the BPSK structure in the ranging...
In this paper, Multiplicative shift register and the analog correlator using a DS-SS method produced a prototype of the Short Range Radar is an introduction to the structure, the experimental results are discussed. For better resolution in radar use of the fast signal is needed. Multiplicative shift register, the fast signal generation by using parallel and, serializer get by using high-speed sequence...
This paper presents a compact and robust solution to use stereo vision to detect pedestrians as well as measure their instantaneous distances from the vehicle. This simplifies sensor requirements as the same video information (captured from two cameras) is used for detection of pedestrians as well as measurement of their corresponding distances. To apply stereo vision technique a novel approach has...
During the initial uplink synchronization, the BS communicates with MSs to adjust timing and power offsets. The common method to achieve the objective is to use the orthogonal code in the frequency domain for OFDMA systems. Due to the timing offset, the orthogonality of codes is decayed and multiple access interference (MAI) becomes serious. In order to decrease this influence, we proposed the idea...
The main problem with time based distance measurements in indoor environment is that multipath propagation can lead to improper estimation of distance. If we consider situation when weak direct signal is followed by strong reflected signal it will appear that a receiver will measure greater distance than it should. The paper presents new approach to distance measurements based on revealing first signal...
Multicarrier CDMA (MC-CDMA) can represent an alternative to classical DS-CDMA for the design of GNSS ranging signals. A first requirement MC-CDMA signals must fulfill is that their generation on a satellite payload be feasible. It is well known, indeed, that multicarrier signals have a high Peak-to-Average Power-Ratio (PAPR) and GNSS signals, as well as other signals used in satellite communications,...
Multipath, Multiple-Access-Interference (MAI) and Near-Far effect are three main influences on the performance of CDMA-based communication and navigation systems. A great deal of research has been conducted to develop advanced signal processing algorithms and novel receiver structures useful for mitigation of these effects in mobile land wireless communication systems, such as UMTS. One effect way...
Recently, wireless sensor networks have received considerable attention. In order to realize these networks, it is very important to estimate the position of indivisual nodes. The purpose of this study is to improve the accuracy of positioning. In wireless sensor networks, since a large number of sensor nodes are densely distributed over the target field, the sensor are closely located. As a result,...
Binary images (Bi-level images; Bi-Color images, Two-tone images or Monochrome images) have been widely used in image processing, such as facsimile, letters, map archives, digital libraries, fingerprint databases, and those documents that could not be recognized by OCR. In order to reduce the storage space of binary images, there are many researchers attempted to propose more efficient algorithms...
A vehicular radar is an essential device for reducing traffic accidents. Direct sequence ultra wideband (DS-UWB) radar has been studied in recent years as a kind of radar enabling high-precision ranging. In this paper, we assume that all vehicles are equipped with the DS-UWB radar in the platoon environment. The purpose of this paper is to show the platoon characteristics when automatic speed control...
In recent years, IR-UWB technology is introduced to TOA estimation and widely used in ranging systems for its high resolution in time domain. This paper proposes a novel TOA estimation method based on fractional correlation, which is a generalization of traditional time domain correlation. Since fractional correlation has shift variant property, it presents some interesting characters, e.g. the correlation...
It is assumed that approximately one third of severe car accidents are related to drowsiness. Warning systems such as the Mercedes Benz Attention Assist try to tackle this problem by analyzing the driving style. Previous work investigated the estimation of measures (features) from lane data that correlate well with impaired driving. Unfortunately, these features require a lane-tracking camera, which...
Gaussianity assumption is prevalent and fundamental to many statistical theories and engineering applications. Range measurement errors are generally assumed to reveal Gaussian distribution. We wish to analyze the hypothesis that Xi ~ N(μ, σ2) for i = 0, 1, ..., n - 1 where n is total number of range measurements X. To scrutinize this hypothesis, instead of relying on artificially generated random...
Time of arrival (TOA) based techniques are widely used in many ranging and localization problems. But because their performance highly depends on the accuracy of the TOA estimation of direct-paths, it's challenging to achieve accurate position estimations under dense multipath or Non-Line-of-Sight (NLOS) condition. In this paper, an algorithm which combines Time difference of arrival (TDOA) technique...
In this paper, we present Golay code based bi-carrier detection and ranging algorithm that offers improved range resolution. We exploit the zero side lobe property of complementary Golay Code pair for detection and side lobe free ranging of targets. The complementary Golay code pair is transmitted on two orthogonal carriers of a bi-carrier signal We propose base band filtering of the complementary...
The relation between work-family conflict (WFC) and job satisfaction was examined using a six-dimensional measure of WFC and a nine-facets measure of job satisfaction. Data were collected from 166 frontline employees in a manufacturing company in China. The results supported the negative correlation between WFC and job satisfaction. And the relation between WFC dimensions and facets of job satisfaction...
To attain autonomy is an important task for adolescent, as well as a key to adolescent normal psychological social development. At the same time, the harmonious relationship with parents is good for the heathy development of adolescent behavioral autonomy, and also promote adolescent social adjustment. To explore the weekly characteristics of adolescent behavioral autonomy and the relationship between...
Aims: To explore the factors which affect Normal University students' attitude toward homosexuality. Method: Questionnaires were distributed to Normal University Students. A total of 621 heterosexuals with 144 males and 477 females completed the questionnaires. Result: On the revised version of Attitude Toward Lesbians and Gay Men Scale, boys had more scores than girls, and participants had more scores...
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