Radio transmitting device incorporating provision for adapting to load. RU patent 2271605.

FIELD: radio engineering; radio communications.

SUBSTANCE: proposed short-wave radio transmitting device designed for operation into mismatched load has exciter 1, adjustable stage 3 and output stage 6, power supply in the form of pulsed power module 5 having drooping characteristic that provides for constant power supply to load and maintains field voltage across stage at level ensuring its operation under critical (optimal) conditions, pulse-width controller 4, and reference-voltage supply 12, as well as differential amplifiers 9, 13, multipliers 8, 11, output-signal peak value sensor 2, input-stage input-current sensor 10, and output-stage peak voltage sensor 7.

EFFECT: enhanced output power and commercial efficiency.

1 cl, 1 dwg

IPC classes for russian patent Radio transmitting device incorporating provision for adapting to load. RU patent 2271605. (RU 2271605):

H04B1/04 - TRANSMISSION (transmission systems for measured values, control or similar signals G08C; speech analysis or synthesis G10L; coding, decoding or code conversion, in general H03M; broadcast communication H04H; multiplex systems H04J; secret communication H04K; transmission of digital information H04L; wireless communication networks H04W)

H03G3/20 - Automatic control (combined with volume compression or expansion H03G0007000000)

Another patents in same IPC classes:

Method for estimating phase and amplitude in wireless communication system / 2271068
In order to enhance quality of coherent demodulation in system use is made of subchannels which are not subchannels for pilot signals. To this end, corrected data received over main channel are used to obtain better estimate of pilot-signal channel which is then used for demodulating data channel.

Method for adaptive on-line noise compensation / 2271066
Proposed method includes suppression of single noise when single compensation channel is available or more than single noise in case there is respective number of compensation channels with signals received over side lobes of main-antenna directivity pattern in satellite communication system. Signals received are numbered and expanded into quadrature components in analog-to-digital converters, this being followed by quadrature processing. Signal readout delay is introduced in compensator channels while weighting coefficient is being computed using adaptive algorithm in digital processor. The latter functions to compute optimal weighting coefficients using sample correlation matrix access. Time required for computing according to adaptive algorithm and for operations related to data input in digital processor and weighting coefficient output from digital processor is shorter than delay time introduced, that is, it meets on-line computation requirement.

Device for transmitting phase-manipulated signals / 2269868
Transmitting device, containing generator of phase-manipulated signals 1, power amplifier 4 and transmitting antenna 7, additionally has serially connected subtracter 2, and quantizer for three levels 3, serially connected current indicator and synchronization device 6, output of which is connected to transmission antenna 7, while second output of current indicator 5 is connected to subtracting input of subtracter 2, while output of generator of phase-manipulated signals 1 is connected to adding input of subtracter 2, and also, output of quantizer 3 is connected to input of power amplifier 4, output of which is connected to input of current indicator 5, while power amplifier is made the key element.

Pseudorandom noise generators for expanded-spectrum communication systems / 2269202
Mobile station receives attempt of locking in synchronism with pilot signal by processing signal received by means of first set of pseudorandom noise sequences and if it fails to lock in synchronism, signal received is processes by means of second set of pseudorandom noise sequences; in the process first set of pseudorandom noise sequences is generated in compliance with standard IS-95-A and second set of pseudorandom sequences may be reverse to first set.

Method for narrow-band noise correction / 2269201
Proposed method for narrow-band noise correction depends for generating complex Fourier spectrum of time counts obtained as result of output process sampling as well as for shaping complex spectrum of time counts from complex Fourier spectrum which is mirror image of useful-signal wave frequency of time-count complex spectrum followed by shaping sum and difference of these spectrums. Useful signal copy is recovered upon shaping difference spectrum module, its division by two, multiplying by shaped phase multiplicand, and reverse Fourier transform of product obtained.

Noise suppression device / 2269200
Proposed device that can be used in radio communication systems operation under impact of one or more sources of noise differing from signal either by spatial characteristics (whose disposition is not in direction of maximal radiation of antenna directivity pattern) or by spectral characteristics (asymmetry relative to central frequency of signal spectrum) has weighting coefficient shaping unit whereto signals arrive from direction finder that controls direction to noise source and from directivity pattern shape setting unit of antenna-feeder system. Computed weighting coefficients are supplied to adaptive spatial filter which is also supplied with signals from outputs of radio receivers; output signal picked off adaptive spatial filter arrives at noise corrector, noise spectrum being asymmetrical relative to central frequency of signal spectrum.

System for transmission of quad-encoded radio signals / 2268550
System consists of transmitter portion, which has clock pulse generator, Different-code generator, generator of double frequency manipulation signals, modulator, frequencies synthesizer, pseudo-random numbers generator, connected via broadcast pipe to receipt portion, which has demodulator, frequencies synthesizer, pseudo-random numbers generator, signals selector, clock pulse generator, block for selecting additional series, first and second two-channeled synchronized filters, first and second subtracter, interference compensator and resolving block.

Device for finding broadband signals / 2268549
Device has key 18 and third threshold comparison block 19, serially connected clock RS-trigger 20 and timer 21, and also logic block 22, output of which is an output of device and is connected to controlling block of block for controlling switching of channels 11, while output of element AND 12 is connected to first input of logic block 22, first input of key 18 and input of third threshold comparison block 19 are connected and are output of device, while output of third threshold comparison block 19 is connected to second input of key 18, first input of clock RS-trigger 20 and first controlling input of logic block 22, second controlling input of which is connected to output of timer 21 and second input of clock RS-trigger.

Method and device for controlling communications system with gating of transmission / 2267861
Technology includes four frame transmission methods at 1/8 speed, in which to achieve aforementioned results one half of frame is gated, and another half is sent at nominal transmission power. Also, power control system sets, when power control bits of direct communication line are truncated by remote station 50, and in accordance thereto does not perform transmission energy adjustment.

Method and system for controlling both radio communication system and radio network controller / 2267223
During preparation for switching of communication channel in adjacent radio network controller additional list of base stations is compiled, which can form additional set of candidates, if aforementioned adjacent controller of radio network is supposed to be made active radio network controller. If connection is switched to base station, which belongs to another radio network controller, user information is redirected appropriately for transfer to active radio network controller through controller node.

Circuits of transmitter for communication systems / 2258309
One of methods is method for providing linear adjustment of level of output power of transmitter, containing device with multiple discontinuous setting values of amplification coefficient, and device with smooth adjustment of setting value of amplification coefficient, including steps for determining amplitude transfer function of transmitter for each said set of discontinuous setting values, forming of compensation table for amplification coefficient, receiving said setting values, reading compensated setting value of amplification coefficient from compensation table, adjustment of amplification coefficient.

Radio transmitting device incorporating provision for adapting to load / 2271605
Proposed short-wave radio transmitting device designed for operation into mismatched load has exciter 1, adjustable stage 3 and output stage 6, power supply in the form of pulsed power module 5 having drooping characteristic that provides for constant power supply to load and maintains field voltage across stage at level ensuring its operation under critical (optimal) conditions, pulse-width controller 4, and reference-voltage supply 12, as well as differential amplifiers 9, 13, multipliers 8, 11, output-signal peak value sensor 2, input-stage input-current sensor 10, and output-stage peak voltage sensor 7.

Linearization device for amplifier with alternating amplification / 2273949
Transformed control signal is sent onto first circuit (input cascade fig.8) of linearization device, which generates a set of exponentially connected signals, for example, by means of differential amplifier, collector currents of transistors of which contain exponentially connected signals. Second circuit (output cascade) input linearization device is made on differential amplifier and receives to one of inputs and to its common point the exponentially connected signals of first circuit, and in response generates amplification control signal. By approximate synchronization of second circuit with amplifying cascade of amplifiers with alternating amplification and utilization of amplification control signal, generated by second circuit, transfer amplifier function of amplifiers with alternating amplification approximates appropriate characteristic of exponentially connected signals.

Format distortion feedback (fdfb) / 2289880
Amplifier format distortion feedback (FB) consists of conversion deviation signal forming chain implemented using resistors (2,3) inserted between output and input of inverting amplifier (4), which has conversion slope control input (5). Received conversion deviation signal is multiplied by multiplier (1), whose signal adaptively defines amplifier (4) transfer characteristic slope. Such FB is adaptive non-linear, that is format distortion feedback (FDFB).

Method for automatic adjustment of radio-electronic device and automatic adjuster / 2292126
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.

Pulse-code signal selector incorporating automatic digital gain control / 2292639
Proposed pulse-code signal detector incorporating automatic digital gain control has channels, each one incorporating main amplifier connected in series with main threshold element, decoder connected in series with pulse shaper, and first switch whose data input is connected to decoder input and control input, to pulse shaper output; next-channel main amplifier gain is higher by an order of magnitude than that of preceding one; all channels are connected in parallel and newly introduced in each one are preamplifier whose gain is higher by an order of magnitude than that of next one and threshold element; input of entire selector functions as common input of all preamplifiers; preamplifier output is connected to data input of main amplifier and to input of additional threshold element; output of additional threshold element is connected to control input of main amplifier; each channel has phase protection unit; output of main threshold element is connected to input of phase protection unit whose output is connected to decoder input and to data input of first switch; outputs of first switches in each channel function as selector outputs.

Method and device for increasing interference resistance of a receiver / 2305363
In accordance to the invention, in the method and in the device, power level of received signal is determined. If the power level equals or exceeds a predetermined threshold value, then amplifier 703 with low inherent noises is bridged 730. In alternative realizations, detector is used for high level of radio frequency power 105 for controlling amplification coefficient of input cascade 110 as a function of interference power. Continuous control over amplification coefficient makes it possible to suppress interference and to synchronize sensitivity of the receiver at lower signal levels, compared to the case of block with radio frequency amplification coefficient commutation block 730. Method of the invention allows synchronization of amplification coefficient at input with a predetermined value 1601. during operation of the receiver, change of control coefficient power of intermediate frequency signal 1605 is measured. If aforementioned change is less than the predetermined value 1610, then level of interference and signal is below the minimal noise level and, therefore, amplification coefficient is increased 1615. If the change of power of intermediate frequency signal exceeds a predetermined value, then presence of distortions is obvious and amplification coefficient is decreased to decrease the level of inter-modulation components 1620. Aforementioned process is used to produce best trade-off between interferences and noise factor during operation of the receiver.

Automatic signal gain control method / 2345477
Invention refers to signal gain control devices in telecommunication equipment and specifically to VoIP voice gain control methods. Method contains the stages as followings: incomer measurements, simultaneous calculation of two, the first and second current gains based on measuring result, calculation of total gain by multiplication of the first and second current gains, and output gain control based on calculated total gain.

Method and device for loudness level regulation / 2365030
Method and device for regulation of loudness level are offered. The device 1 of loudness level regulation contains a definition module 20, a memory module, the first counting module 24 and the second counting module 26. The first counting module 24 contains a comparator 240 and a multiplier 241. The definition module 20 receives an input acoustical signal where the input acoustical signal is connected with set of input sound sources and corresponds to one of the specified input sound sources, besides; the definition module mounts change of a corresponding input sound source of an input acoustical signal. The memory module keeps set of input sound records. The first counting module calculates an input acoustical signal according to an input acoustical signal and input sound records.

Method for automatic control of peak values of electrical broadcast signals on given level with stabilisation of relative mean power and device for realising said method / 2383101
Invention relates to communication engineering and can be used when recording and playing back monophonic sound broadcast signals, as well as during transmission over communication lines. A method and a device for realising said method are proposed, which provide non-inertia limiting and companding sound broadcast signals without enrichment of their spectrum with considerable increase in relative mean power and are characterised by high control efficiency in channels with unstable transmission coefficient, reduced distortions when varying control parametres of signals with rapid change of level, as well as subjective perceptible quality of signal due to reduced masking of its high-frequency components. This is ensured by using inertial automatic control of level and delay of input and output signals respectively by approximately 160 and 10 mcs.