RU2269203C1 - Combined optical and extremely-high frequency receiver - Google Patents

Abstract

FIELD: communications engineering.

SUBSTANCE: proposed receiver designed for transmitting and receiving signals in combined optical and extremely-high frequency band may be found useful in stationary ground-base, satellite, and promising satellite-to-satellite space radio communication lines being updated by using directive medium of optical and extremely-high frequency band. To this end, proposed device has receiver and optical radiation intensity meter, first and second similarity circuits, first and second switches, comparison circuit, receiver and extremely-high frequency radiation meter, control circuit, decision taking and processing unit that incorporates buffer and decision taking and processing circuit.

EFFECT: enhanced probability of adequate message reception.

1 cl, 1 dwg

Description

The invention relates to communication systems that transmit and receive signals in a combined millimeter-wave range, and can be used in stationary terrestrial, satellite, as well as promising inter-satellite communication lines of modernized low-channel space radio communications systems based on the use of a guiding medium of the optical and millimeter wave ranges.

The device is designed to provide signal reception during the organization of communication networks in the interests of fixed and mobile satellite services of small-channel space radio communication systems.

A device for receiving and transmitting information using modulated electromagnetic radiation of two ranges of wavelengths, millimeter and optical, which uses one or another channel for transmitting information depending on the quality of the communication channel (value of signal intensity) [1].

The disadvantage of this device is the inability to use the information of two communication channels at once, optical and millimeter, its comparison and application to increase the likelihood of a correct message.

The technical result consists in increasing the probability of correctly receiving a message in a communication system by increasing reliability, by combining signals of two wavelength ranges of different physical nature, using a cyclic code and using a decision and processing unit.

This goal is achieved by the fact that the combined millimeter-optical receiver contains a receiver (1) and an optical radiation intensity meter (2), the outputs of which are connected to the input of likelihood circuit 1 (5), and the output of the optical radiation receiver is connected to the information input of key 1 ( 9), the output of likelihood circuit 1 (5) is connected to the input of the comparison circuit (7), the receiver (4) and millimeter radiation intensity meter (3), the outputs of which are connected to the input of the likelihood circuit 2 (6), as well as the output of the millimeter-wave detector (4) is connected to the information input of key 2 (10), the output of likelihood circuit 2 (6) is connected to the input of the comparison circuit (7), the output of the comparison circuit (7) is connected to the input of the control circuit (8), the outputs of the control circuit (8 ) are connected to the control inputs of keys 1 (9) and 2 (10), respectively, the information outputs of keys 1 (9) and 2 (10) are connected to the inputs of the decision and processing unit (11), which contains a buffer (12) and a decision circuit solutions and processing (13).

The drawing 1 shows a functional diagram of the proposed combined optical-millimeter receiver,

The receiver operates as follows.

An information signal is received at the input of the receivers of the optical and millimeter ranges, at the same time, information on their intensity is generated in the intensity meters of the optical and millimeter ranges. The output signal from the receiver of the optical range, as well as information about its intensity from the intensity meter of the optical range, enters into the likelihood scheme 1. Similarly, the output signal from the receiver of the millimeter range, as well as information about its intensity from the millimeter range intensity meter, enters into the likelihood scheme 2. In likelihood schemes 1 and 2, the likelihood index obtained from data on the intensity of each of radiation alone, ie, the origin of the waves of the optical and millimeter range of different physical nature, and it is impossible to directly compare the radiation intensities of these ranges. It is proposed to compare the intensities through relative values, i.e. when designing the communication channel, the possible minimum and maximum values of the signal intensities of the optical and millimeter ranges are taken into account, these values are assigned the values zero and one, respectively. The remaining intensities are in the range 0≤i≤1. The intensities are compared according to the given relative values. After attaching to each element of binary information the likelihood index (0≤i≤1), these elements go to a comparison circuit in which their likelihood indices are evaluated, the results of the CC assessment are provided to the control circuit, which, on the basis of these data, prefers a particular channel, giving the command to lock the key 1 or 2, respectively. In the case of various information symbols entering the comparison circuit (zero on one channel, one on the other channel, or vice versa) and a negligible difference in their likelihood indices, the control circuit gives the command to close both keys simultaneously and the information symbols enter a buffer in which under the influence of the adoption circuit solving and processing, the correct combination of characters is detected using the Bose-Chowdhury-Hockingham cyclic code (BCH), which with a short code combination length of 15 to 32, allows you to correct three-time errors, and detect four-time. [2].

Thus, the present invention allows the simultaneous use of signals of different physical nature, i.e. in different conditions of an interference environment, in the absence of communication in one of the ranges, the other will provide a high probability of receiving signals, and due to this, noise immunity increases.

Literature

1. A method of transmitting information and a device for its implementation. Russian patent No. 2188510, 7 Н 04 В 10/10, filed April 17, 2001, published August 27, 2002.

2. S.V.Barketov, V.V. Kulikov, E.P. Potapov, K.M. Sagdeev, "Theory of electrical communication", part 3, "Codes with the detection and correction of errors", a training manual. Stavropol: - FRVI RV, 1999

Claims (1)

Combined optical-millimeter receiver, comprising a receiver and a meter of optical radiation intensity, a receiver and a millimeter-wave intensity meter, characterized in that the first and second likelihood schemes, a comparison circuit, a control circuit, a first and second keys, a decision block and processing, which contains a buffer and a decision-making and processing scheme, while the received signals of the optical and millimeter range are fed to the inputs of the optical receivers and the measuring range and optical and millimeter radiation intensity meters, the output signal from the optical range receiver, as well as information about its intensity from the optical range intensity meter, enters the first likelihood scheme, and the output signal from the millimeter range receiver, as well as information about its intensity with millimeter-wave intensity meter, enters the second likelihood scheme, in the likelihood schemes two are connected to each element of the likelihood index information, the outputs of the likelihood schemes are connected to the inputs of the comparison circuit, the output of which is connected to the input of the control unit, the outputs of the control circuit are connected to the control inputs of the keys, the information inputs of the keys are connected to the outputs of the respective receivers, the outputs of the keys are connected to the inputs of the decision and processing unit , the intensities are compared according to the likelihood indices by the comparison circuit, and the signals are processed in the decision-making and processing unit using the loop code of Bowes-Chowdhury-Hockingham, the output signal in the form of a binary sequence is generated at the output of the decision-making and processing unit.