Automated equalizer of output signal levels of optical amplifiers of multichannel systems

FIELD: physics.

SUBSTANCE: essence of the proposed invention is to use the branch devices based on micro resonators in the signal fibre, after the chain amplifier, coupled with the micro actuators controlled by the electronic circuits that use the signals of the photodetectors-sensors of the power level distribution in the signal fibre to produce commands controlling the position of the micro actuators, with the purpose of automatic adjustment of the power levels across the operating range of the equalizer by changing the connection of the micro resonators with a signal fibre.

EFFECT: possibility of constructing a universal equalizer, operable without the individual configuration with any type of the optical amplifier, the automatic alignment operations of the power levels passing through the signal fibre, in the framework of the project working range of the transmitted signals and providing the technological capabilities of the integrated implementation of the device design, with a small amount of the power consumption and the possibility of the remote control of the linear signal uniformity at the amplifier output when embedded in the telemechanic system algorithm.

4 cl, 2 dwg



Same patents:

FIELD: physics.

SUBSTANCE: large distributed facilities use highly reliable optical networks which are self-healing data transmission ring networks based on single-fibre optical infrastructure, which provides fail-proof user communication in case of non-recurrent breakdowns of optical lines using the wave multiplexing principle, wherein the maximum speed in fibre-optic lines of such networks can reach up to 160 Gbps.

EFFECT: high efficiency and reliability of communication in optical networks for accessing broadband multimedia services of information-telecommunication networks when switching to next generation packet networks, in highly reliable local area data networks with a wide coverage area used in transport infrastructure.

1 dwg

FIELD: physics, communication.

SUBSTANCE: proposed invention relates to communications equipment and may be used in telecommunication technologies. The invention comprises a unit of wave compression and division, a device of division of directions of light flux propagation, and also a group of external connectors. Besides, usage of optical multiplexers-demultiplexers with division of propagating directions makes it possible to increase number of connected subscribers in a single-fibre network infrastructure of a passive network of wideband access with wave division, and also to double a number of channels in single-fibre systems of transmission and in other optical systems with wave compression, without change in the number of wave lengths used in these systems.

EFFECT: technical result consists in increased number of connected subscribers and provision of the possibility to implement effective system-network solutions in wideband multimedia services in optical access networks, in manifold and other optical telecommunications networks.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication means in which information is transferred using surface electromagnetic waves, more precisely surface plasmon-polaritons in the terahertz (THz) range, directed by the flat surface of a conducting substrate, and can be used in plasmon-based communication networks and in information collection and processing devices using THz electromagnetic waves. The method includes arranging non-uniformities; forming channels on separate substrates; the faces of all substrates are rectangular; the non-uniformities used are the edges of the substrates directed perpendicular to the track of the initial surface plasmon-polariton (SPP); using said edge to convert the SPP into a volume wave which is divided into a series of spaced-apart secondary volume waves, the number of which is not less than the number of secondary channels, in each of which corresponding to the volume wave, a derivative of the initial SPP is generated using the edge of the substrate.

EFFECT: rapid interfacing of main and secondary plasmon links.

2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in optical communication systems. The communication system comprises: nodes (1021-102n), configured to communicate with one or more devices; a central node (100); a passive optical network (106), having a multiplexer/demultiplexer (108), configured to demultiplex a first optical signal transmitted from the central node (100) to nodes (1021-102n), and multiplex second optical signals, obtained from one or more nodes (1021-102n), each assigned a wavelength on which it emits an optical signal; wherein for forward transmission of signals from one node (1021-102n) to at least one of the other nodes (1021-102n), said node (1021-102n) is configured to emit, at a wavelength assigned to said at least one other node (1021-102n), an optical signal comprising a signal to be transmitted; and the multiplexer/demultiplexer (108) of the passive optical network (106) is configured to combine the optical signal from said one node (1021-102n) with the first optical signal.

EFFECT: high throughput of transmission channels.

15 cl, 7 dwg

FIELD: information technology.

SUBSTANCE: device consists of N-1 optical nano-amplifiers, an optical (N+1)-input nanofibre coupler, two constant optical signal sources, two telescopic nanotubes, an optical nanofibre Q-output splitter, an optical Q-input nanofibre feedback coupler, P groups of input optical nanofibres, P groups of intermediate optical nanofibres, P groups of output optical nanofibres, M optical P-input nanofibre couplers.

EFFECT: simple device and nano-design thereof.

2 dwg

FIELD: information technologies.

SUBSTANCE: in the system the first and second N-channel switchboards are included with N information inputs and outputs, N2 control inputs, the first and second control signal generators (CSG), N information inputs of the first switchboard are information inputs of optic fibre transmission systems (OFTS), and N information outputs of the second are outputs, an n information output, where of the first switchboard is connected to an appropriate input of an electronic optic converter (EOC), an n input, where of the second switchboard - with an appropriate output of an optic electronic converter (OEC), N2 control outputs of the first CSG are connected to appropriate control inputs of the first switchboard, and an additional synchronising output of the first CSG is connected to an additional EOC input, N2 control outputs of the second CSG with appropriate control inputs of the second switchboard, an additional output of the OEC is connected with the input of the second one.

EFFECT: higher information security.

4 dwg

FIELD: information technologies.

SUBSTANCE: due to assessment of throughput capacity of a damaged line and generation of a linear signal, which has required properties for distribution along this communication line, and for successful decision making at the reception end, the damaged communication line may be used to transfer low-speed flow with the specified reliability, which makes it possible to transfer information that is critical to delivery time.

EFFECT: development of a method for organisation of emergency mode of multiplexer operation and a device for its realisation, making it possible to transfer low-speed information with the specified reliability in case parameters of fibre optic linear track deteriorate and/or it is impossible to maintain synchronisation.

2 cl, 2 dwg

FIELD: information technology.

SUBSTANCE: fibre-optic data transmission system with protection from unauthorised access has a transmitting and a receiving part connected by a fibre-optic channel, the transmitting part comprising a parallel data input bus, a pulse former, M matching amplifiers, M transmitting optoelectronic modules, M fibre-optic delay lines, an optical spectrally-selective coupler and an optical amplifier, a parallel N bit register, a memory device, and the receiving part comprising an optical spectrally-selective splitter, a fibre-optic delay line, a receiving optoelectronic module, a parallel data output bus consisting of N data lines and clock lines, (M-1) fibre-optic delay lines, (M-1) receiving optoelectronic modules, an OR logic element and a second memory device.

EFFECT: high level of protection of transmitted information from unauthorised access.

3 dwg

FIELD: information technologies.

SUBSTANCE: at transmitting side prior to conversion into optical signal, spatial switching of channels sending electric signals is carried out, based on change of switching matrix by available law, using random number as an argument, which is generated in time intervals Δt, defined by speed of information transfer in channels, while switching matrix changes, synchronising control signals are generated, comprising information on random number used for switching in this time interval, and sent along N+1 channel to receiving side, where after optical-electronic conversion initial signals are restored in channels, by realisation of reverse operation of channels switching according to the same law with application of synchronising control signals for according time intervals.

EFFECT: enhanced protection of information.

2 dwg

FIELD: physics.

SUBSTANCE: device has an optical power coupler, first, second and third collimating microlenses, a holographic photoplate, a nonlinear threshold device, a semi-transparent mirror, an array of detectors and a reference optical radiation source. One percent output of the optical power coupler is connected to a single-mode optical fibre, whose output coincides with the front focal plane of the first microlens, the rear focal plane of which coincides with the front plane of the holographic photoplate whose rear plane coincides with the front focal plane of the second microlens, the rear focal plane of which coincides with the input of the nonlinear threshold device, whose output is optically connected by the semi-transparent mirror to the third microlens, in whose focal plane the array of detectors lies. Radiation from the source and radiation of the useful signal from the output of the first microlens forms a interference pattern in the plane of the holographic photoplane.

EFFECT: higher efficiency and methodical reliability of continuous monitoring linear channels of fibre-optic transmission systems with wavelength-division multiplexing and fibre-optic amplifiers.

2 dwg

FIELD: physics.

SUBSTANCE: method of attenuating a composite audio signal comprises steps for sampling the composite audio signal; transforming the sampled audio signal, using a fast fourier transform algorithm, to produce a signal representative of the amplitude of component frequencies of the audio signal; comparing the transformed audio signal with a predefined impulse control threshold profile, representing the target maximum amplitude for each frequency component for the audio signal threshold profile to produce a configuring signal representative of the difference between the broadcast signal and the profile; using the configuring signal to automatically configure in real time a Finite Impulse Response (FIR) filter so that it attenuates the amplitude of the transformed audio signal in frequency bands centred on the frequencies at which the target threshold is exceeded; and outputting the attenuated audio signal for consumer exposure.

EFFECT: increasing audio quality by compensating for the level of background noise.

26 cl, 9 dwg

FIELD: physics.

SUBSTANCE: method of correcting acoustic signal playback using an electroacoustic transducer is characterised by determination of parametres for correcting acoustic signal playback using an electroacoustic transducer by using the frequency characteristic of the acoustic power of the electroacoustic transducer, where evaluation thereof is performed by taking measurements on the surface surrounding the electroacoustic transducer or segment thereof. Measurement results are received from multiple discrete points on that surface or segment thereof, and the spectrum of the played back acoustic control signal is matched with the noise spectrum at the measurement point. A device for implementing method is also disclosed.

EFFECT: improved playback parametres of acoustic signals of different electroacoustic transducers.

12 cl, 8 dwg

FIELD: physics; acoustics.

SUBSTANCE: invention relates to decoding an audio signal and more specifically to decoding parametric encoded audio signals. According to the present invention, parametres extracted from the bit stream of a parametric encoded audio signal are adjusted by a user, and signal components are synthesised based on the adjusted parametres which should be displayed for the user such that, the user can adjust amplitude of their signal components in order to use different sound effects in accordance with user requirements. Also since the equaliser function in realised in the codec of the audio playback device, additional equaliser modules are not required.

EFFECT: more accurate signal restoration and simple audio playback device.

18 cl, 5 dwg

FIELD: physics; radio.

SUBSTANCE: invention relates to audio signal processing and more specifically to a method of realising an equaliser in a device designed for processing an audio signal. In accordance with the method and the device, values of frequency components are regulated in accordance with user input before subrange sample data are converted to a frequency domain signal in an audio signal decoder, thereby realising an equaliser in the decoder.

EFFECT: easier realisation of a device for playing back an audio signal, and reduced delay of the equaliser.

7 cl, 4 dwg

FIELD: technical cybernetics and radio engineering, possible use for building devices for automatic correction of frequency distortions occurring in, for example, sound amplification channels.

SUBSTANCE: method includes comparing spectrum of original signal to spectrum of resulting signal, generated after distorting channel. Comparison results are used for influencing the original signal for changing ratios of its spectrum components. One of variants of the method is to determine normalized spectrums. Two spectrum analyzers, controllable frequency corrector, comparison block and control block are main component parts of the device.

EFFECT: automatic correction of amplitude-frequency distortions introduced by real distorting channel, without usage of special test signal.

3 cl, 3 dwg

FIELD: sound engineering; domestic stationary sound-reproducing centers.

SUBSTANCE: proposed method for tuning sound-reproducing channel includes generation of test signal, estimation of results of test signal passage through sound-reproducing channel, this being followed by variation of gain-frequency response shape according to estimate obtained; results of test signal passage through sound-reproducing channel are estimated in compliance with individual psycho-acoustic sensations of listener; test signal is essentially sequence of alternating signals varying with time and lying in different sections of audio-range frequencies.

EFFECT: ability of tuning sound-reproducing channel in compliance with psycho-acoustic sensations of listener.

3 cl, 3 dwg

FIELD: radio engineering and technical cybernetics.

SUBSTANCE: concept, upon which automatic adjustment method is based, assumes that user after manually adjusting a radio-electronic device records adjustments under name, appropriate for signal, in which adjustments took place, and on repeated receipt of this signal it is recognized and adjustment are read from memory automatically. For realization of idea automatic adjuster contains controlled block, signal recognition block, memory block and control code generator.

EFFECT: possible automatic adjustment of electronic device in accordance to certain requirements of user and without addition of special information about adjustments to useful input signal.

3 cl, 9 dwg

FIELD: audio-frequency signals and sound-reproducing channels.

SUBSTANCE: proposed method includes initial setting of desired tone quality of chosen record by individually adjusting sound-reproducing channel, storage of these adjustments, storage of individual characteristics of chosen record, recording, storage of individual characteristics of chosen record complying with individual adjustments of sound-reproducing channel, identification of mentioned record during repeated reproduction, and automatic adjustment of chosen-record tone quality by setting stored adjustments of sound-reproducing channel. Proposed device has controlled tone quality unit and memory unit.

EFFECT: ability of automatic adjustment of each individual record tone quality in compliance with listener's desire.

6 cl, 3 dwg

FIELD: radio engineering, possible use for constructing means for automatic control over signal spectrum shape, for example, automatic adjustment of timbre of sound in audio equipment by means of equalizer.

SUBSTANCE: invention is based on comparison of spectrums of original and standard signals and further on correction of relations between spectrum components of original spectrum with use of comparison results.

EFFECT: stabilization of signal spectrum by means of automatic adaptive frequency correction in accordance to arbitrarily set requirements.

4 cl, 2 dwg

FIELD: engineering of devices for processing signals of sound frequency, possible use for altering shape of spectrum of source signal depending on volume level of reproduction, possible utilization as block for precision tone compensation in house appliance sound-reproducing complexes of classes Hi - Fi.

SUBSTANCE: in psycho-acoustic processor, containing n-band controllable timbre-block and n-channel control block, controlling output of control block is connected to control input of controllable timbre-block, input and output of which are respectively input and output of processor, and additionally contained are block for selecting acoustic isoglottic line and device for measuring sound volume level, output of which is connected to information input of control block, volume level indicator is utilized for measuring volume level of sound signal of sound reproducing route, composition of which includes psycho-acoustic processor.

EFFECT: automatic alternation of shape of spectrum of output signal depending on volume level of its reproduction by taking shape of acoustic isoglottic line, appropriate for current volume, into consideration.

2 cl, 3 dwg

FIELD: information technology.

SUBSTANCE: invention relates to systems, methods and circuits for processing audio signals for presentation in a high noise level signal, and also provides methods for adjustments with permanent programming of a multiband equaliser, which compensate for anomalies associated with the given listening medium.

EFFECT: high-quality presentation of audio in high noise level systems.

24 cl, 9 dwg