Results 271 to 280 of about 28,354 (309)

Communication modes with partially coherent fields

Journal of the Optical Society of America A, 2007
We develop a theory for the description of partially coherent wave fields in linear optical systems in terms of the so-called communication modes. The communication modes are the singular functions and singular values of the appropriate propagation kernels.
Martinsson, Per, Lajunen, Hanna, Friberg, Ari, T.   +3 more
openaire   +3 more sources

Self-coherent OFDM for wireless communications

2015 IEEE International Conference on Communications (ICC), 2015
In this paper, we present self-coherent OFDM, a well-known non-coherent technique in optical communications, for wireless RF communications. Self-coherent OFDM is known to have complete immunity against phase noise using a simple RF front-end receiver and to provide a significantly higher spectral efficiency than self-het OFDM, which uses at most 50 ...
Qianyu Jin, Yi Hong 0001, Emanuele Viterbo   +2 more
openaire   +1 more source

Coherent Communication Systems

2020
In this chapter, we outline the modern coherent communication formats and how they are realized. These coherent communication formats enable long-distance and high-speed transmission. We also discuss the sources of noise in optical communication systems and the relationship between signal to noise, bit error rate, and communication format.
openaire   +1 more source

Quantum communication with three coherent states

IEEE Transactions on Communications, 1995
Quantum communication with a nonsymmetrical set of three states is considered. Some results obtained from numerical computation are presented. A model for quantum detection called "near optimum", similar to the binary case, is studied. Calculations of error probability in detection schemes subject to information criteria are performed and discussed ...
T.Uyematsu, C. Bendjaballah
openaire   +1 more source

Coherent Optical Communication

Seventh Topical Meeting on Integrated and Guided-Wave Optics, 1984
Virtually all fibre transmission systems up to the present have used simple intensity modulation of the transmit laser, most frequently in the form of binary ON/OFF modulation. At the receiver, incoming optical power has been converted directly to photocurrent in a photodetector.
openaire   +1 more source

The RACE to coherent communication

Physics World, 1991
Most optical communications systems use only a fraction of the enormous transmission capacity of optical fibre. Now an EC-funded consortium has built a demonstrator capable of carrying 10 digitised television signals along fibre by the technique of multi-channel coherent optical transmission.
openaire   +1 more source

Coherent Optical Communications

20th European Microwave Conference, 1990, 1990
A variety of coherent optical communications are reviewed in comparison with microwave communications.
openaire   +1 more source

Coherent Optical Communication

2022
Xizheng Ke, Ke Dong
  +4 more sources

Performance of coherent and non-coherent receivers of UWB communication

Second IFIP International Conference on Wireless and Optical Communications Networks, 2005. WOCN 2005., 2005
Ultra-wideband (UWB) technology is currently investigated as one viable solution for high capacity short range indoor systems, because of its robustness in dense multipath environment, low cost and low power implementation, and the high bit rates achievable.
A. Idriss, R. Moorfeld, S. Zeisberg, A. Finger   +3 more
openaire   +1 more source

The coherence of linguistic communities

2022
Karen V. Beaman, Gregory R. Guy
openaire   +2 more sources