The control device susceptibility of the receiver to interference
(57) Abstract:Use: to control the sensitivity of the receiver to interference from non-primary receiving channels for industrial control. The inventive device includes generators 1,4,7, counters 2,5,10,14,17, two DAC 6, the adder 8, the start block 9, decoders 11,18, the attenuator 12, a memory unit 13, a comparator 15,the amplitude detector 16, the indicator 19, controlled radio receiver 20. The positive effect is due to the exclusion from the process of measurement of time intervals, during which registered a priori known information about radio controlled, which leads to a reduction in testing time. 2 Il. The invention relates to electrical engineering and can be used to control the sensitivity of the receiver to interference from non-primary receiving channels for industrial control, acceptance tests and maintenance during operation.In Fig. 1 shows the structural electrical diagram of the device control the sensitivity of the receiver to interference, and Fig.2 timing diagram explaining the operation of the device.The control device susceptibility of the receiver to interference from the Converter 3 and the first controllable oscillator 4, connected in series to the second counter 5 pulses, an input connected to the output of the overflow of the first counter 2 pulse, the second d / a Converter 6, the second controllable oscillator 7 and an adder 8, a second input connected to the output of the first controlled oscillator, block 9 run, the output of which is connected to the blocking input of the clock generator 1, connected in series, the third count 10 pulses, the input connected to the output of the overflow of the second counter 5 pulses, and the output of the overflow from the input unit 9 starts, the first decoder 11 and controlled attenuator 12, a signal input connected to the output of the adder 8, and the output is the input of the controlled radio receiver 20, connected in series, the memory unit 13, an input connected to the output of the third counter 10 pulses, and a fourth counter 14 pulses, the comparator 15, the output of which is connected to the fourth input of the counter 14 pulses, the amplitude detector 16, the output of which is connected to the input of the comparator 15, and the input is the output of the monitored receiver 20, connected in series fifth counter 17 pulses, an input connected to the output of the fourth counter 14 pulses, the second is>/P>The first, second, third, and fifth counts 2, 5, 10, 17 pulses is performed on the chip IE and LA.The first and second d / a converters 3 and 6 provided on the chip TO PA and COD.The first and second driven generators 4 and 7 consist of a generator of high frequency two transistors made according to the principle of compensation of losses in the circuit due to the positive feedback, and power amplifier with transformer resistance at the output for matching the output impedance of the power amplifier and the input impedance of the adder. In the oscillatory circuit of the high frequency generator is enabled varicap, which is the reorganization of the generator frequency.The adder 8 is made on the resistors.Unit 9 run performed on digital circuits LA.The first and second decoders 11 and 18 are made of digital circuits ID and ID respectively.Controlled attenuator 12 is a resistive matrix, and since the difference of attenuation between adjacent levels are equal, the matrix is made on the required number of resistors of the two denominations. Switching levels is done with the help of the designs on the chip RU.The fourth counter 14 pulses is performed on the digital chip IE.The comparator 15 is performed on the analog chip UD.Amplitude detector serial diode detector.Indicator 19 is made on seven-segment LCD.The control device susceptibility of the receiver to interference operates as follows.The pulses from the output of the clock generator 1 is fed to the input of the first (reversible) counter 2 pulse (mod M1). On its information outputs a sequence of binary numbers from 0 to M1:
M1Df/ F, where Df frequency range;
F the bandwidth of the radio.These codes are converted to the first digital to analog Converter 3 in a stepwise increasing voltage. When the number M1at the output of the overflow of the first counter 2 pulse signal is formed of the transfer, which switches the addition function for the subtraction function. This will form a decreasing sequence of numbers from M1to 0, with which the first d / a Converter 3 will form a step less voltage. When it reaches 0 is formed seasom voltage of a triangular shape controls the scanning frequency f1the first controlled oscillator 4 in the range of Df.The pulses of the shift of functions from the output of the overflow of the first counter 2 pulse is fed to the input of a second counter (reverse) 5 pulses (mod M2= M1), which together with the second digital-to-analogue Converter 6 generates a voltage of a triangular shape that controls the scanning frequency f2the second controlled oscillator 7 in the range of Df.The level of capacity of the first and second driven generators 4 and 7 are the same, because there is no reason for the other ratios. Next, the signals are sent to the adder 8, the output of which is the total signal at the signal input of the controlled attenuator 12.The pulses of the shift functions of the second counter 5 pulses fed to the input of the third counter 10 pulses (mod M3):
M3h, where h is the number of levels controlled attenuator 12.The possible range of power output controlled attenuator 12 is equal to
DP(dB) 10 lg (Pnl/Pabout), where Rnlpower blocks (specified in the relevant standards);
Paboutthe sensitivity threshold of the receiver.The number of levels to use etcic 10 pulses represents a digital counter with pre-loading the data.Because to a certain power level Prthe probing signal (Rabout< Pr< PVLwhere 1 < r < h) at the output of the monitored receiver will be shown only the responses corresponding to the main receive channel, the number of which is a priori known, then the measurement should start with level r. Binary numbers r is loaded into the third count 10 pulses when the device is switched on.The value of Pris determined based on the worst selectivity of non-core radio receiving channels (regulated by the relevant standards).Thus under the action of the input pulses at the output of the third counter 10 pulses successively appear binaries numbers from r to h, which are decrypted by the first decoder 11, an output signal which sequentially switches controlled attenuator 12 to the appropriate level of attenuation.With the output controlled attenuator 11 probing the impact is input to the controlled radio receiver 22, the responses of which the intermediate frequency amplifier arrive at the amplitude detector 16, the output of which is the envelope of the response is supplied to a comparator 15, SS="ptx2">Further, the pulses corresponding to the responses received on the fourth input of the counter 14 pulses.The fourth counter 14 pulse is a digital counter with programmable conversion module M4.When switching on each level i (rih) attenuation binary code numbers i supplied to the address input of the memory block 13. When this occurs, load the appropriate values of the conversion module M4iin the fourth counter 14 pulses.Unit conversion for each level of expression
M4iNo/Kiwhere NaboutMih the number of responses at the output of the monitored receiver during the measurement corresponding to the main receive channel;
Kiweighting factors.Using the weighting coefficients of the linear dependence of R(t) are taken into account the required time periods, the presence of the i-th level of attenuation in a controlled attenuator for discrete simulation of the desired law of probability distribution capacity of interfering signals in real electromagnetic environment
w(P) bP-m, Rswhere b (1-m)/Pnl1-mPabout1-m) normalizing multiplier;
m degree Ki is the expression
TO1(Bh+1-1Bh-i)/(B-1) > 1, where B (Pnl/Pabout)(m-1)/h.C output of the fourth counter 14 pulse every M4ithe first pulse received at the input of the fifth counter 17 pulses, in which it is possible to pre-load data. When turning on the device it is loaded binary code relative number of responses, due to the main receive channel that may arise at the output of the monitored receiver under the action of the probing signal from level 1 to r-th
MK/No.Upon receipt of each pulse from the output of the fourth counter 14 pulses, this value is incremented by one.Thus, during the measurement at the output of the fifth counter 17 pulses will appear binary number
G=MKi+NiK/No.The numerator is the number of responses, due to both the primary and secondary receiving channels appearing at the output of the controlled radio when applying to the input of the probing signals simulating the projected electromagnetic environment with a uniform frequency distribution and probability distribution capacity of interfering signals according to the law w(P).Physical the signal bandwidth of the radio with regard to non-primary channels.Thus, G statistical characteristics of the radio showing the relative width equivalent to the number of penetrating signal bandwidth of the radio conditions of the actual electromagnetic environment and, thus, to quantitatively assess the actual sensitivity of the receiver to interference.Binary code is obtained by measuring the change in G is supplied to the second decoder 18, the output of which is connected to a digital indicator 19.After passing through the third count 10 pulses of the totality of pulses at its output overflow appears impulse blocking at the input of block 9 run, the output of which appears the level of the blocking oscillator 1, and the control process will stop.As a result, the time control will be reduced in comparison with the prototype in
( Ki)/(h r + 1) >> 1 times.The next time you start after you click, which is part of block 9 run, its output will be level, authorizing the operation of the clock generator 1 and the measurement process repeated. The CONTROL DEVICE susceptibility of the RECEIVER TO INTERFERENCE, containing consistently associated the memory, the comparator and indicator, characterized in that, to reduce the control time entered sequentially connected to the second counter, the input of which is connected to the first output of the first counter and the first d / a Converter, the output of which is connected to the input of the second generator, the output of which is connected to the first input of the adder, the output of which is connected to the first input of the controlled attenuator, the second input of the adder coupled to the output of the second generator, whose input is entered through the second d / a Converter connected to the second output of the first counter, connected in series, the third counter, the input connected to the output of the second counter, the start block and the clock generator, the output of which is connected to the input of the first counter, the first decoder, the input of which is connected to a second output of the third counter, which is connected to the input of the memory block, the output of the first decoder connected to the second input of the controlled attenuator connected in series to the fourth counter, one input of which is connected to the output of the memory block, and the other with the comparator output, the input connected to the output of the amplitude detector, the fifth count and the second decoder, the output is
FIELD: radio communications.
SUBSTANCE: pulse noise is detected upon conversion of signal received into intermediate frequency, noise active time is determined, information signal is disconnected from amplifier incorporated in superheterodyne receiver, noise-affected part of information signal is recovered by eliminating simulator signals during extrapolation, and superheterodyne receiver is checked for serviceability at intermediate frequency.
EFFECT: enhanced precision of superheterodyne receiver serviceability check.
1 cl, 1 dwg
FIELD: cellular code-division radio communication systems using variable-speed voice coders.
SUBSTANCE: proposed method for evaluating data transfer speed includes suggestion of m hypotheses on data transfer speed for each data frame received and generation of k data metrics for each of them. Relationship between truth estimate of each hypothesis and aggregate values of respective data quality metrics is specified for generating truth estimates of each hypothesis and value of this relationship is found for data quality metrics obtained for frame received. Data quality is checked and decision is shaped on adopted speed and quality of received-frame decoded data.
EFFECT: enhanced precision of evaluating data transfer speed in forward and backward communication channels and data frames received with errors.
14 cl, 1 dwg
FIELD: radio communications engineering.
SUBSTANCE: proposed device has information signal source, threshold unit, pulse shaper, AND gate, differentiating unit, radio station transmitter and receiver.
EFFECT: enhanced checkup precision.
1 cl, 2 dwg
FIELD: automated control and diagnostics systems.
SUBSTANCE: first variant of complex includes control computer, mating block, commutator, local data exchange main, tests forming block, logical analyzer, signature analyzer, synchronization block, digital oscillographs block, special form signals programmed generators block, programmed power-sources block. Second variant of complex additionally includes block for forming high-frequency test signals and block for measuring high-frequency signals.
EFFECT: broader functional capabilities, higher efficiency, higher reliability.
2 cl, 2 dwg
SUBSTANCE: communication system has decoder and testing system for sending test data to decoder. Test data include signaling data field, sent via traffic channel, and speech signal parameters, encoded via channel encoding, are formed in form of frames by testing device and sent to decoder for decoding. Decoder extracts at lest a portion of signaling data field, sent along traffic channel, from decoded test data and sends at least a portion of signaling data, sent via traffic channel, back to testing device. Efficiency of decoding is measured by comparison of sent field of signaling data, sent along traffic channel, and signaling data field, sent along traffic channel, received in testing device.
EFFECT: higher quality, higher efficiency.
3 cl, 6 dwg
FIELD: communications engineering.
SUBSTANCE: method includes configuring a receiver with possible waiting for receipt of communication channel at full data transfer speed, and signal from transmitter is sent to receiver. Signal is sent via communication channel with data transfer speed, different from full speed of data transfer, and at level of power for receipt at full data transfer speed. As a result receiver can not receiver communication channel at full data transfer speed. In receiver relation of received signal to noise is determined. Value of quality coefficient bit is determined ion basis of certain relation of signal to noise. Determined value of quality coefficient bit is sent to transmitter.
EFFECT: higher efficiency.
3 cl, 3 dwg, 7 tbl
FIELD: measuring equipment.
SUBSTANCE: device additionally features microcontrollers, one of which generates gating pulses, guided into controlled fiber-optic line before test pseudo-random series, and second one, while receiving gating pulses, produces synchronization signals.
EFFECT: simplified construction, higher efficiency, broader functional capabilities.
FIELD: radio engineering.
SUBSTANCE: mobile station supports counter of serial bad frames, C1, and counter of serial good frames, C2. at the beginning of call C1 and C2 are set to zero value. For each received frame mobile station determines, whether the frame is good, bad or empty. If the frame is good, than C1 is dropped to zero value, and C2 is increased by one unit. If the frame is bad, than C1 is increased by one unit, and C2 is dropped to zero value. If received frame is empty, than C1 and C2 stay unchanged. When C1 reaches threshold value, T1, mobile station blocks its transmitter. Accordingly, if C2 reaches threshold value, T2, then mobile station activates its transmitter again.
EFFECT: higher efficiency.
3 cl, 3 dwg
FIELD: mobile telecommunication systems.
SUBSTANCE: system has decoder and testing device, for sending test data to decoder. Test data, containing signaling data in format of signaling frames are generated, and test data are shown in two serial frames and sent from testing device to decoder for decoding. Signaling data are decoded from received two frames of test data and sent back to testing device being encoded as one frame. Working parameters of decoding are determined by comparing sent data of signaling and received data of signaling in testing device.
EFFECT: higher efficiency.
3 cl, 6 dwg, 1 tbl
FIELD: radio engineering.
SUBSTANCE: method includes determining required values of energy parameters for each client station, predicting value of parameters, distributing temporal-frequency resource between client stations.
EFFECT: higher efficiency of use of temporal-frequency resource, decreased energy consumption during transmission of data.
9 cl, 3 dwg