SU985957A1 - Device for correlation separation of group signal - Google Patents

Description

The invention relates to communications and, in particular, can be used in discrete information transmission systems.

Known devices for the correlation separation of a group signal containing a Walsh function generator, each s of the η outputs of which is connected to nej> the input of the corresponding signal converter, the second inputs of which are combined 11J.

However, the accuracy of separation of the group signal by this device is low.

The purpose of the invention is to increase the accuracy of separation of the group signal.

This goal is achieved by the fact that in a group ¹⁵ signal separation device containing a Walsh function generator, each of the η outputs of which is connected to the first input of the corresponding signal converter, the second inputs of which are combined, ²⁰ first and second integrators, an anologic code converter, and η reversible ones are introduced counters, and the inputs of the first and second integrators are combined, and the outputs are connected to the inputs of the analog code converter, the first output of which is connected to the second inputs of the signal converters, each output one of which is connected to the control input of the corresponding counter, and the counting inputs of the reversing counters are connected to the second output of the analog-to-code converter.

In FIG. 1 is a structural electrical diagram of the described group signal separation device; on Fig_2 - time diagrams explaining its operation.

The device contains a generator of Walsh functions 1, signal converters 2, an analog-code converter 3, integrators 4 and 5 η reversible counters 6.

The correlation separation unit of the group signal operates as follows.

The group signal Z ^ -t) (Fig. 2) is fed to the input of the correlation device—

985957 4th division. At intervals with an odd yomer K, the group signal is integrated by integrator 4 (see Fig. 2). On intervals with an even number K, the group signal is integrated by the integrator $ 5 (^ 2 ^on Φ ^ig · 2). The integration results are stored at the outputs of the integrators for a time after the end of the integration process, and then the integrators return to their original state. The integration results are then transferred to the analog-code converter 3, which converts the analog quantity to the number of pulses (£ j in Fig. 2), and pulse packets corresponding to the absolute values of the converted quantity are generated at the output of the analog-to-code converter, and at the sign output ( £ 4 in Fig. 2) - signals corresponding to the sign of this quantity. Moreover, a positive level of the converted value corresponds to logical level 1, and a negative value corresponds to logical level O. Signals from the sign output of the analog-to-code converter go to the? 5 combined inputs of signal converters 2 made on equivalence logic elements. The other inputs of these elements receive the signals of the Walsh function from the outputs of the generator 30 of Walsh functions 1, and the level + (A) of these functions is assigned, the level is logical 1, and the level is (A) -. logical level 0.

The signals from the pulse output of the pre-: ₃₅ educator analog code are fed to the counting inputs of the reversing counters 6. The control inputs of the counters receive signals from the outputs, logic elements, equivalence. Moreover, the level - 4 ₀ logical 1 corresponds to the operation mode of the counter summation, and the level of logical O - mode subtraction. Reverse counters work during time T. After the end of the group signal, information is read from the outputs of the counters and they are returned to their initial state (zeroing).

The application of the invention improves the accuracy of the separation of the group signal.

Claims (1)

(54) DEVICE FOR CORRELATING DIVISION OF GROUP SIGNAL 1 The invention relates to communications and, in particular, can be applied in discrete information transmission systems. There are known devices for the correlation separation of the group signal, containing the Walsh function generator, each of the n outputs of which are connected to the nepvvoy input of the corresponding signal converter, the second inputs of which are combined tlJHowever, the accuracy of separation of the group signal by this device is low. The purpose of the invention is to improve the accuracy of separation of the group signal. This goal is achieved by the fact that a group signal generator device containing a Walsh function generator, each of whose h outputs is connected to the first input of the corresponding signal converter, the second inputs of which are combined, the first and second integrators, the converter analog-code and reverse counters, the inputs of the first second integrator are combined, and the outputs are connected to the converter inputs analogue code, the first output of which is connected ic to the second inputs of signal converters, each output the first of which is connected to a control input of a corresponding counter, and the counting inputs of the reversible counter is connected to the second output transducer analog code. FIG. Figure 1 shows the structural electrical circuit of the described group signal separation device; 2 shows timing diagrams for his work. The device contains a Walker 1 generator, 2 signal converters, an analog-code 3 converter, integrators 4 and 5 g of reversible counters 6. The device for correlating the group signal is working as follows. The full 71 ™ (-t) signal (Fig. 2) is fed to the input of the correlator Uton-Horo separator. At intervals with Heneiv. With a home number K, the group signal is integrated by integrator 4 (see f in FIG. 2). At even-number intervals, the group signal is integrated by integrator 5 (fg in Fig. 2). The results of the integration are stored at the outputs of the integrators for a time T. after the end of the integration process, and then the integrators return to the initial state. The integration results are then transmitted to the converter analogue1. Code 3, which converts the analog value to the number of pulses (РЭ 2) at the output of the analogue converter -bc, bursts of pulses are formed, corresponding to the absolute values of the converted value, and on the sign output (j. In Fig. 2) - signals corresponding to the sign of this magnitude. Moreover, the logical value 1 corresponds to a positive value of the transformed value, and the logical level O corresponds to a negative value. Signals from the sign output of the converter are analogous to the code fed to the combined inputs of signal converters 2 performed on the equivalence logic elements. The other inputs of these elements receive signals from the Walsh function from the outputs of the generator of Walsh 1 functions, and the level. + (A) of these functions is set in accordance with logic level 1, and level- (A) logic level O. Signals from the pulse output of the analog-code converter are fed to the counting inputs of reversible counters 6. The control inputs of the counters receive a signal from the outputs, logical elements, equivalence. Moreover, the level of logical 1 corresponds to the mode of operation of the counter summation, and the level of logical O - the mode of subtraction. Reversible counters operate for a time T. After the end of the group signal, information is read from the outputs of the counters and returned to their original state (set to zero). The application of the present invention improves the accuracy of separation of the baseband signal. The formula of the invention The device of the correlating section of the group signal contains the Walsh function erator gene, each of the n outputs of which are connected to the first input of the corresponding signal converter, the second of which are connected, in order to increase the triviality of separation of the group signal into it the first and second integrators were introduced, the analog-code converter and the reversible counter, with the inputs of the first and second integrators combined, and the outputs connected to the inputs of the converter analog - code, the first output of which is connected to the second inputs of the signal converters, the output of each of which is connected to the control input of the corresponding reversible counter, and the inputs of the reversible counters are connected to the second output of the analog-code converter. Sources of information, taken into consideration at the examination 1. D. Dyuyov N. G. and others. Orthogonal and quasi-orthogonal signals. M., Holy H. 1977, p. 165 (prototype). phage, 1 2gr h figg