The sealing device channels

 

(57) Abstract:

Usage: telecommunication, communication systems, code compaction and separation channels (signals). Summary of the invention in the known device signaling using quasiorthogonal signals as the reference channel signals arise mutual interference that significantly reduces the noise immunity of information transmission. The sealing device of the channels contains an adder 1, N multiplier products 2, the generator 3 of the reference channel signals, N 4 blocks subtraction, N 5 blocks calculate the correction voltage, N 6 blocks of memory, the generator 7 clock pulses. 1 Il.

The invention relates to telecommunication and can be used in communication systems with parallel transmission of information, as well as to seal wired, microwave and satellite communication lines.

Goal is to increase the noise immunity of the transmission of information.

The drawing shows a structural electric circuit multiplexers.

The sealing device of the channels contains an adder 1, N multiplier products 2, the generator 3 of the reference channel signals, N 4 blocks subtraction, N blocks 5 calculating adjustment S="ptx2">

The generator 7 generates pulses with a period T, where T is the repetition period information signals. Upon receipt of the next clock pulse read timing signals Cjthe inputs of the sealing device. In N blocks 5 is calculated voltage interference for each compressed signal, taking into account the correlation coefficients, which are stored in N blocks 6 and are read into the corresponding N blocks 5.

N blocks of 4 is the dierence between the readings of the information signals Cjand calculated stresses mutual interference for the data samples. The results deduct Commission in each channel are multiplied with the reference channel signals into N 2 multiplier products coming from the generator 3, and are summed in the adder 1. Under counts understood pulses So

With the next clock pulse cycle of operation of the multiplexers is repeated.

It should be emphasized that the effectiveness of the device for the suppression of mutual interference will depend on the RMS values of the correlation coefficients r = . If the mean value from the account of the mutual interference in the j-th channel = Vcr will be less than Vcthen EF is, the inRR> Vcthe efficiency of the device is negative, i.e., after the seal of signal power to interference will not decrease, but will increase as additives in all channels will be given for the j-th channel of mutual interference, but the value is more than compensated for the disturbance.

Determine the area of effective use. On the transmission side are a group signal

Xg(t) = CiSi(t) = (Ci+Ci)Si(t)

and at the receiving side in the j-th channel are the reference voltage

Uj= (1/T) Ci+CSi(t)+n(t)JSi(t)dt =

= CjVc+VcCirij+CjVc+Vc.

This shows that if signicade critical value of U= Cirijwill be less than the mean importance values U= Cirijthe effectiveness of the proposed device will be high. Since /Ci/ = 1, a sCiC, prirodna RMS values Ujand UItget .

This equality allows us to obtain the value r = 1/, where the efficiency of the device is positive, i.e., reduced power interference. It should be noted that effektivnostpukola, i.e., Ci(-1,1).

The SEALING DEVICE of CHANNELS, comprising a generator of clock pulses (GTI), connected in series generator reference channel signals of the multiplier products and the adder, the output of which is the output device, the control input of the generator of the reference channel signal is connected to the output of the GTI and is clocked by the output device, characterized in that it introduced serially connected N memory blocks, N units calculating adjustment voltage and N blocks subtraction, N - 1 information inputs which are connected with the first information input of the N - 1 blocks calculate the correction voltage, the N-th input is connected to the information input N block subtraction, in this case, all N information inputs N blocks subtraction are the same input device, the N-th inputs 1 and N-th blocks calculate the correcting voltages are connected, the control inputs of N blocks calculate the correcting voltages are interconnected and connected to the output of the GTI, the outputs of blocks subtraction is connected to other inputs of the respective N multiplier products.

 

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