Multi-channel communication system

 

(57) Abstract:

The invention relates to electro - and radio and can be used for sealing wire, radio, microwave, optical and space lines of communication. The technical result is increased reliability and simplification of the receiving part of the system. Multi-channel communication system includes a transmitting side encodes the block 1, the synchronizer 2, time pointing device 3, a transmitter 4, synchroblog 5, at the receiving side, the receiver 6, a coherent filter 7, a comparator 8, the first 9 and a third storage device 10, a decoder 11, the device of the sample and hold signal 12, synchroblog 13, the pulse shaper 14, the binary counter 15, the communication line 16. 1 Il.

The invention relates to electro - and radio and can be used for sealing wire, radio, microwave, optical and satellite communication lines.

Known multi-channel communication system with a transmitting side To a multiplier products, the driver signals the address transfer, the logical processing unit, the transmitter and synchroblog; at the receiving side (2to-1) multiplier products, integrators, key blocks, the decoder and the recipients (1).

However, the Wu is a multichannel communication system (2).

It contains on the transmission side encodes the block consisting of the driver signals the address transfer and shaper group signal, the transmitter and synchroblog, and at the receiving side of the receiver, the block signal processing, solver, decoder, synchroblog and the driver signals of the addresses of the reception.

The former group signal are combined here To multiplier products and the adder in the block of signal processing - 2tochannel processing and in the final device - adders and crucial blocks. Synchroblog on the transmitting and the receiving side provides the performance of a system.

However, this system is complex and expensive, has low reliability and difficult to manufacture.

The invention is aimed at simplifying the receiving system to improve its overall reliability and reduce the cost of manufacture.

To do this in a multi-channel communication system on the transmission side in encoding the block forming unit group of the signal is performed in a time manipulator, and the driver signals the address transfer is in the form of a synchronizer, a first input connected to (K+1)-th entry of temporary manipulator, and the second with (K+2)-th input and the input is La (matched filter), introduced sequentially connected to the comparator and the first and second storage devices, the device of the sample and hold signal, the signal input of which is connected to the output of the matched filter, the clock input to the comparator output, and the output is connected to a second signal input of the comparator and connected in series shaper pulse and a binary counter whose outputs are connected to signal inputs of the first storage device, and the clock input of the comparator is connected to the output of the pulse shaper, the second clock inputs of the binary counter and a sample and hold signal is combined with a clock input of the second storage device and is connected to the output of synchroblog, connected to the input of the shaper pulses, the outputs of the second storage device are connected to corresponding inputs of the decoder.

The drawing shows a functional diagram of the proposed multi-channel communication system.

Multi-channel communication system includes a transmitting side encodes the block 1, consisting of a synchronizer 2 and temporal manipulator 3, the first To inputs, which are inputs of the system, (K+1)-th and (K+2)-th inputs of Sedogo manipulator 3, and synchroblog 5, an input connected to the second output of the synchronizer 2, and the output connected to the second input of the transmitter 4, and at the receiving side is connected in series receiver 6, a coherent filter (SF) 7, a comparator 8, the first storage device (memory) 9, a second storage device (memory) 10 and the decoder 11, the device of the sample and hold signal (water economy Department) 12, a signal input which is connected to the output SF 7, the clock input to the output of the comparator 8, and the output is connected to a second signal input of the comparator 8, and connected in series synchroblog 13, the inlet of which is connected to the second clock output of the receiver 6, the pulse shaper (PHI) 14, and a binary counter (DC) 15 whose outputs are connected to respective signal inputs of the memory 9, and the clock input of the comparator 8 is connected to the output PHI 14, the second clock inputs of the water economy Department of 12 and a DC 15 combined with a clock input of the memory 10 and is connected to the output of synchroblog 13; transmitting and receiving side of the system are connected through the communication line 16, the outputs of the decoder 11 are system outputs.

Multi-channel system operates as follows.

On the transmission side For (K= 1,2,3...) synchronous channel signal consisting of symbols the config manipulator 3, so that its output at times=ST/2k(where S is the value of the input binary number in decimal form) relative to the leading edge of the pulse, the current at the second output of the synchronizer 2 and coincides with the beginning of the channel symbols is formed a rectangular pulse (or pseudo-random signal) of duration T/2kequal to the repetition period of short pulses from the first output of the synchronizer 2. Thus, each combination of input channel symbols corresponds to one of the 2ktemporary provisions of the signal block 3 on the time interval 0, T (and so on). Received multicast signal together with the synchronization signals coming from synchroblog 5 and bearing information about the beginning of the channel symbols transmitted by the transmitter 4 through the communication line 16. At the receiving side group signal along with interference from the output of the receiver 6, optimally processed in SF 7 and is supplied to the signal inputs of the comparator 8 and the water economy Department 12. The inputs PHI 14, the water economy Department 12, GS 15, and the memory 10 is supplied with short pulses with a period T equal to the duration information symbols generated in synchroblog 13 to the output clock of the receiver 6 and coincides with the moments of the eye is X 12, DS 15 and the memory 10, and the output PHI 14 is formed 2kshort pulses with a period T/2kcorresponding time possible positions of the maxima of the filtered signal. At the time the first of them (leading edge) of the output signal SF 7 is supplied to the comparator 8 and compared to the level of the signal input at the second signal input unit, the water economy Department 12 (in this case zero). If it is more recent, then the output of comparator 8 is formed by a voltage drop, which opens the entrance of the water economy Department of 12 and allows it to remember the level of the output signal SF 7. This procedure is repeated 2ktime. As a result, by the time of arrival of the second pulse from the output of block 13 in the water economy Department 12 is recorded the highest level of the output signal SF 7 for a time equal to T. the Binary K-bit counter BC 15 is designed for counting the number of pulses entering from the output of the PHI block 14. Whenever the output of comparator 8, you get a voltage drop readings K digits DC 15 is read into the memory 9. This allows you to fix the number of temporary positions most of the output signals SF 7 in the time interval T. In the time of arrival of the second pulse with W input binary number in channel symbols, which in the absence of interference coincide with the transmitted information symbols.

Thus, the proposed multi-channel communication system allows us to simplify the receiving part, to increase the reliability and reduce the cost of manufacturing.

Sources of information

1. USSR author's certificate N 809611, H 04 J 11/00, from 28.02.81.

2. USSR author's certificate N 907834, H 04 J 11/00, from 23.02.82.

Multi-channel communication system with a transmitting side encodes the block consisting of the driver signals the address transfer and shaper group signal, the transmitter and synchroblog, and the first To the input of the shaper group signal are outputs of the system, and To a combination of inputs connected to respective outputs of the driver signals the address transfer, synchrolift through which synchroblog connected to the second input of the transmitter, the first input connected to the output of the shaper group signal, and at the receiving side connected in series receiver and the block signal processing, synchroblog, an input connected to the clock output of the receiver, and a decoder, the outputs of which are outputs of the system, and the shaper group signal is executed in a time manipulator, and the driver signals the address transfer in the form of a synchronizer, the first output of which is connected to the (K + 1)-th entry of temporary manipulator, the second with (K + 2)-th input and the input of synchroblog, and at the receiving side block of the signal processing executed in the form of a matched filter and introduced sequentially connected to the comparator and the first and second storage devices, the device of the sample and hold signal, the signal input of which is connected to the output of the matched filter, the clock input to the output of the comparator, and the output is connected to a second signal input of the comparator, and connected in series shaper pulse and a binary counter whose outputs are connected to signal inputs of the first storage device, and the clock input of the comparator is connected to the output of the pulse shaper, the second clock inputs of the binary counter and a sample and hold signal is combined with a clock input of the second storage device and is connected to the output of synchroblog connected to the input of the shaper pulses, the outputs of the second storage device are connected to corresponding inputs of the decoder.

 

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