SU720777A1 - Device for receiving discrete signals - Google Patents

Description

(54) DEVICE FOR RECEIVING DISCRETE SIGNALS

Claims (1)

The invention relates to radio engineering and can be used in telemetry systems with enhanced noise immunity for receiving multi-channel messages using pseudo-random sequences (PRS). - A device for receiving discrete signals is known, containing a code converter, the outputs of which are connected to the inputs of a digital-analog converter, the output of which is connected to the input of the distributor, the clock input of which is connected to the clock inputs of the digital-analog converter and the code converter and the output of the clock to whose input sync signal 1 output is connected. However, the known device has insufficient noise immunity. The purpose of the invention is to improve noise immunity. For this purpose, a device for receiving disc signals, containing a transducer of the code whose outputs are connected to the inputs of a diffu-analog converter, the output of which is connected to the input of the distributor. the clock input of which is connected to the clock inputs of the digital-to-analog converter and code converter and the clock output, to the input of which the output of the sync signal unit is connected, OR elements, an additional distributor, matched filters, an additional digital-to-analog converter and an encoder whose outputs are connected to the inputs are entered an additional digital-to-analog converter, the output of the kOTOporo is connected to the input of an additional distributor, the clock input of which is connected to the clock inputs additional digital-to-analog converter, encoder, clock output, and clock inputs of matched filters whose outputs are connected to the inputs of the corresponding OR elements, outputs of which are connected to the inputs of the encoder, and the input of the block of the synchronous signal section of the synchronized signal, the outputs of which are connected to the inputs of the corresponding OR elements, the outputs of which are connected to the inputs of the code converter. ..-, - v-.:.-. --- .-- -: .-., ..- .. S - r --i ---- -. - IP. - .-- ----..-.--- A- ,, the drawing shows the structural electrical diagram of the proposed device. The device diagram contains matched filters 1, elements 2 OR encoder 3, converter 4 codes, digital-to-analog converter (DAC), 5, distributor 6, elements 7 OR and 8 / additional 1р1фр6аныхогьшш converter 9, additional distributor 10, block 11 selections of the synchroic signal and timing generator 12. . The device works as follows. Telemetry signal multistep; yaliyoto ". ,, f.;. f .----; -; J- ir: V -. V-.4: .i - .- ;: ----- -: .-. :: .. ..-.-.-,) ii arrives one-time at the signal inputs of matched filters 1. Of the entire aggregate of filters. 1 signal of the response to the image .iSfCH of TOLSYO at the output of that filter, the configuration of which corresponds to the structure of the SRP that arrived in a given time interval at the input of the device. The signal from the output of the corresponding matched filter 1, whose index corresponds to the level number of the quantized alternating parameter | 5a i-iro channel through element 2 OR arrives on; The corresponding encoder input is 3 t-bit binary codes (n). With the help of a digital-to-analog converter 9, this binary code is converted into the instantaneous value of the fast-paced parameter of the i-ro channel. 1 or O) of the code word of the j-th slow channel, the process described above is repeated. Analogue high-speed analogue signals p6 are separated from the corresponding channels using the M-channel distributor 10. Signals corresponding to 1 or O of the current code word, slow from the channel, from the outputs of matched filters 1 through the elements 7, 8 OR come to input1 converters 4 of the serial code in parilenny. njJHxdfla 1YT input of the device {M th SRFs in the converter 4 will record the full M-bit j-fO of the slow-moving channel, which in the digital-to-analog converter 5 will be converted into an analog signal of this channel. Spreading the analog slow-moving signals along the corresponding channel; m performs with the N-channel distributor 6; From the full telemetry frame, using block 11, a sync signal is selected, which synchronizes the local clock 12 in phase. The latter, in its OchrddGs scraps control: shllyusch1 x cigkalov provides software temporary operation of matched filters 1, encoder 3, digital-to-analog converters 9 and 5, distributors 6 and 10 channels and converter 4 serial code into parallel, As follows pz principle of the proposed device, the additional introduction of new evil filters 1 (according to the number of quantization levels of fast-changing parameters), elements 2 OR, an encoder 3 t-bit binary words, elements 7 and 8 OR, as well as additional digital Analogueorooro converter of 9 fast-changing parameters and an M-capacitor of the distributor of 10 fast-changing parameters — the proposed device differs from receiving the digital messages from the specified prototype, since they receive messages in general and divide them into two groups of channels followed by spacing on the appropriate channels. The device for receiving discrete signals, containing a code converter, the outputs of which are connected to the inputs of a digital-to-analog converter, the output of which is connected to the distributor input, the clock input of which is connected to the clock inputs of the digital-analog converter and the code converter and the output of the clock, to the input of which The output of the block is connected. No sync signal, characterized in that, with the aim of increasing the seam level, the elements OR, an additional distributor, matched filters are added to the optional digital-to-analog converter and the IF, the outputs of which are connected to the inputs of the additional analog converter, the output of which is connected to the input of the additional distributor a clock input of which is connected to the T KTOBbiMii inputs of an additional digital-analog inverter, an encoder, a clock output and clock inputs matched This filter, whose outputs are respective inputs to podklyuchepy OR elements, n1hody which are connected to inputs of the encoder, the isolation unit is connected to a clock input sugnalnymi inputs of matched filters, whose outputs are connected to inputs of the respective OR elements, whose outputs are connected to inputs of the code converter. Sources of information brought to attention in the examination 1. USSR Author's Certificate No. 506896, cl. G 08 C 19/16, 1974, (prototype). Outputs l1 1 and