نتایج جستجو برای: current transmitters

تعداد نتایج: 782168  

Journal: :EURASIP Journal on Wireless Communications and Networking 2018

Journal: :IEEE Transactions on Information Theory 2021

Consider a random access communication scenario over channel whose operation is defined for any number of possible transmitters. As in the model recently introduced by Polyanskiy Multiple Access Channel (MAC) with fixed, known transmitters, assumed to be invariant permutations on its inputs, and all active transmitters employ identical encoders. Unlike model, proposed scenario, neither nor rece...

2008
Pavel BEZOUŠEK Vladimír SCHEJBAL

Radar systems, based on bistatic radar concept attracted a substantial attention in the recent years. Passive coherent location systems using “transmitters of opportunity” like radio or TV broadcasters, GSM base stations, satellite communication and GNSS signals proved their potential in detection and tracking moving targets over a significant area. In this paper the multistatic location system...

2007
C. S. Wang Y.-C. Chang L. A. Coldren

High-speed, single-frequency transmitters at 980 nm are reported, with open eye diagrams up to 40 Gbit=s and error-free operation up to 35 Gbit=s. The transmitters consist of a short-cavity, distributed Bragg reflector (DBR) laser with an integrated electro absorption modulator fabricated using a quantum well intermixing processing platform. This represents the fastest bit-rate operation to dat...

Journal: :Discrete Mathematics 2005
K. S. Sudeep Sundar Vishwanathan

In order to avoid interference in cellular telephone networks, sets of radio frequencies are to be assigned to transmitters such that adjacent transmitters are allotted disjoint sets of frequencies. Often these transmitters are laid out like vertices of a triangular lattice in a plane. This problem corresponds to the problem of multicoloring an induced subgraph of a triangular lattice with inte...

Journal: :Nano Comm. Netw. 2013
Chun Tung Chou

Molecular communication networks consist of transmitters and receivers distributed in a fluid medium. The communication in these networks is realised by the transmitters emitting signalling molecules, which are diffused in the medium to reach the receivers. This paper investigates the properties of noise, or the variance of the receiver output, in molecular communication networks. The noise in ...

2011
Marco Boella Francesca Romana Romani Anjela Al-Raies Cristina Solimando Giuliano Lancioni

A model for the unsupervised segmentation and linguistic analysis of Arabic texts of Prophetic tradition (ḥadīṯs), SALAH, is proposed. The model automatically segments each text unit in a transmitter chain (isnād) and a text content (matn) and further analyses each segment according to two distinct pipelines: a set of regular expressions chunks transmitter chains in a graph labeled with the rel...

2006
Lindsay Kleeman Akihisa Ohya

Sonar rings are composed of many ultrasonic receivers arranged in a ring and have in the past used many transmitters. The transmitters have been fired either serially or together and the receivers measure time-of-flight to reflectors in the environment. Serial transmission reduces the measurement rate around the entire ring, whilst parallel transmission incurs interference problems between neig...

Journal: :IEEE Trans. Signal Processing 2003
Yuan-Pei Lin See-May Phoong

The implementation of OFDM transmitters typically consists of a discrete DFT matrix and a digital-to-analog (DAC) converter. Many existing results on the analysis of OFDM systems, e.g., spectral roll-off, are based on a convenient analog representation. In this paper, we show that the analog representation and the DFT-based OFDM transmitters are equivalent only in special cases. Using the analo...

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