optical signal processing systems
Millimetre wave quasi optical signal processing systems
... The device could be suitably called a millimetre wave quasi-optical spatial light modulator 8LM, and is identical in operation to the spatial light modulators used in many optical signal[r] ...
187
Advanced fibre circuitry for all optical signal processing
... A signal is a physical quantity that conveys information about the state or behaviour of a ...every signal can be represented by a corresponding electromagnetic wave and can therefore be transmitted from ...
158
Digital signal processing for optical communications and networks
... of optical communication networks have been widely increased over the past four decades with the introduction and development of optical amplifiers, coherent detection, advanced modulation formats, and ...
22
Improving network scalability and data security of incoherent OCDMA systems by employing ultra fast all-optical signal processing techniques
... Conclusion • OCDMA system improvements through all-optical signal processing – 2ps time gating was used • it significantly increased number of simultaneous users • improved system’s powe[r] ...
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Signal Processing in High-Speed Optical Communications and Impact on Electronic Subsystems
... for optical high-speed transmission. Recently, optical transmission systems employing OFDM have gained considerable research interest [6-11] because OFDM can combat fiber chromatic dispersion [8] and ...
5
Radiofrequency analysis using optical signal processing
... purpose systems capable of performing functions previously accomplished by microwave and lower frequency systems but with order of magnitudes greater speed and ...acoustooptic systems to be produced ...
290
A grating based OCDMA coding:decoding system incorporating a nonlinear optical loop mirror for improved code recognition and noise reduction
... nonlinear optical loop mirror (NOLM) within a time-spreading DS-OCDMA system to act as a fast saturable absorber with which to improve the quality of the code recognition ...an optical fiber followed by ...
11
Improving multi access interference suppression in optical CDMA by using all-optical signal processing
... OCDMA systems in order to minimize the effect of multiple access interference ...autocorrelation signal. This ensures that only the desired autocorrelation signal is passed onto the detector and ...
6
Coherence and polarisation phenomena in optical systems and fibres for signal processing
... the signal at the input of the optical fibre is a combination of two ...a signal that is less coherent ...the optical fibre, but this would only explain the instability at short propagation ...
232
Millimetre wave quasi optical signal processing and spread spectrum techniques
... T = I - E x p { - 2 ( 3 '} 9 3 Combining the expressions above we can therefore estimate the losses in co upling through a single lens. Experience with similar systems indicates that one can model a series of ...
226
Blind Signal Processing in Telecommunication Systems Based on Polynomial Statistics
... training signal. Herewith channel length to useful signal ratio is approximately of one order of magnitude which allows using these tech- nologies in the fast-fading ...
9
A limited feedback scheme for massive MIMO systems based on principal component analysis
... (CSI) [4]. In a time division duplexing (TDD) system, the channel reciprocity can be exploited to acquire the down- link CSI at the BS [5]. However, things become more chal- lenging when the system operates in a ...
12
On the statistical convergence of bias in mode based Kalman filter for switched systems
... Condition (i) in Lemma 1 implies asymptotic stability of every subsystem and condition (ii) is the existence of common Lyapunov quadratic function (CQLF). Also, it is worth pointing out that the stability for each ...
15
Joint channel and phase noise estimation for mmWave full duplex communication systems
... (SI) signal, which is significantly stronger than the desired communication signal [10, ...SI signal can be reduced via two differ- ent suppression techniques: (i) passive suppression, where transmit ...
12
Superimposed signaling inspired channel estimation in full duplex systems
... (HD) systems, data-aided channel estimation in FD systems can be bandwidth inef- ...HD systems is superimposed training, where no explicit time slots are allocated for channel ...effective ...
15
Joint frequency offset, time offset, and channel estimation for OFDM/OQAM systems
... Due to the several benefits of multicarrier modulation (MCM) over single carrier modulation, the former has been considered as the primary choice in the physical layer implementation of telecommunication systems ...
19
Time and Space Integrating Acousto-Optic Signal Processing
... The laser is the "power supply" of an optical signal processing system, as well as the carrier of the information within the system. When the laser power output is[r] ...
479
Face Spoofing Detection Using Machine Learning Approach
... ABSTRACT: For face recognition systems, impostors can obtain legal identity authentication by presenting the printed images, the downloaded images or candid videos to the sensor. Since, the face is a unique ...
6
Joint window and filter optimization for new waveforms in multicarrier systems
... OFDM systems, since waveforms with this property may provide advantages such as low interference among asynchronous users accessing adjacent frequen- cies, spectral efficiency increase through reuse of guard ...
20
A robust fusion estimation with unknown cross covariance in distributed systems
... A robust fusion estimation in distributed systems are derived in this paper which minimizes the worst-case esti- mation errors on some given parameter set. Compared with the BLUE fusion, the RFE tracks well ...
16