RU219303U1 - Radio communication device - Google Patents

Abstract

The utility model relates to radio communication technology. The technical result consists in reducing the adaptation time for the frequency of the radio link, which is achieved by the fact that the radio communication device includes a three-channel transceiver (12) for broadcasting a radio signal generated based on signals from a pseudo-random sequence generator (13) and an information signal generator (11). The response radio signal received by the transceiver (12) from the air enters the filters (8, 9, 10) of the first, central and second components of the test signal, then to the corresponding detectors (5, 6, 7) of the test signal components, and then to the corresponding blocks (2, 3, 4) for evaluating the reliability of the test signal components. From the blocks (2, 3, 4) for evaluating the reliability, the signals are sent to the control unit (1), which transmits to the transceiver (12) a signal with a command to tune the central operating frequency of the main and test radio signals. 1 ill.

Description

The utility model relates to radio communication technology.

A radio communication device is known that contains standard radio communications (transceiver, data transmission equipment) and additionally a real-time communication channel quality assessment unit (RT), a control unit and an adaptation unit for specific conditions of radio wave propagation (description of the patent RU 44 438 U1 IPC H04 B 7/005 (2000.01), published: 10.03.2005).

In a known device, after receiving the test sequence by the transceiver in the channel quality assessment unit in the RT, the computer processor performs a bit-by-bit comparison of the received test sequence with the reference one, and the degree of distortion is calculated by the criterion of bit loss

according to the formula. Pdst=Ncorrectly received messages/Ntransmitted messages. Next, the obtained result is compared with a given threshold value (0.9). When Pdst is less than 0.9, a decision is made on the need to adapt the parameters of the radio link by changing the frequency of the transceiver after a time interval of 20 s with a step of 0.5 MHz. The direction of frequency change is chosen empirically, which increases the tuning time.

The objective of the utility model is automatic frequency adjustment in accordance with rapid changes in the propagation conditions of electromagnetic waves and interference in the radio link.

EFFECT: reducing the time of adaptation to the frequency of the radio link.

The technical result is achieved by the fact that in a radio communication device, including a three-channel transceiver (12), the first and second inputs of which are connected to the output of the information signal generator (11) and the output of the pseudo-random sequence generator (13), and the output of the transceiver is connected to the inputs of the filters (8, 9, 10) of the first, central and second components of the test signal, the outputs of which are respectively connected to the inputs of the detectors (5, 6, 7) of the first, central and second components of the test signal, the outputs of which are connected respectively to the inputs of the blocks (2, 3, 4) for evaluating the reliability on the first, central and second components of the test signal, the outputs of the blocks for evaluating the reliability are connected to the first, second and third inputs of the control unit (1), respectively, and the output of the control unit (1) is connected to the third input of the transceiver (12).

The figure shows a diagram of a radio communication device. It includes:

1 - control unit;

2 - block for evaluating the reliability of the first component of the test signal;

3 - block for evaluating the reliability of the central component of the test signal;

4 - block for evaluating the reliability of the second component of the test signal;

5 - detector of the first component of the test signal;

6 - detector of the central component of the test signal;

7 - detector of the second component of the test signal;

8 - filter of the first component of the test signal;

9 - filter of the central component of the test signal;

10 - filter of the second component of the test signal;

11 - information signal generator;

12 - 3-channel transceiver;

13 - pseudo-random sequence generator.

The output of block 12 is connected to the inputs of blocks 8, 9, 10, the outputs of which are connected, respectively, to the inputs of blocks 5, 6, 7, the outputs of which are connected, respectively, to the inputs of blocks 2, 3, 4, the outputs of which are connected, respectively, to the first, second and third inputs of block 1, the output of which is connected to the third input of block 12, the first and second inputs of which are connected to the outputs of blocks 11 and 13, respectively.

The operation of the radio communication device is as follows.

A) Transfer mode. The useful main information signal is generated in block 11, and the test pseudo-random sequence (PRS) - in block 13. The signals from the outputs of blocks 11 and 13 are fed to the inputs of block 12, where a radio signal is generated for broadcasting, which consists of a useful radio signal and three components of the test radio signal, the frequency of one of which coincides with the central frequency of the narrow-band information main radio signal, and the frequencies of two (side) components are located to the left and right of the center frequency at a distance d1/2+d2/2, where d1 and d2 are the spectrum width at the level of 0.1 from the maximum power value of the useful radio signal spectrum and the spectrum of any component of the test radio signal, respectively. The transmission of the SRP on the side components is carried out regardless of the transmission of the main information, and on the central component - in the interval between interruption and resumption of the transmission of the main information.

B) Reception mode. The main useful information signal, together with the test signal, comes from the air through the antenna to block 12, from the output of which the signal enters the inputs of blocks 8, 9, 10, where the first (left), central and second (right) components are filtered, respectively. Further, from the outputs of the mentioned blocks, the signal arrives, respectively, at the inputs of blocks 5, 6, 7, where demodulation (detection, selection) of information takes place - PSP1, PSP3 and PSP2. Further, the signal from these blocks is fed respectively to the inputs of blocks 2, 3, 4, where the value of the reliability of the transmission of the PRP on each of the components of the test signal is calculated by comparing the received PRP with the transmitted (reference) and determining the number of correctly transmitted bits. Then the signals containing information about the reliability of the transmission from the outputs of blocks 2, 3, 4 are fed to the inputs of block 1, where the values of the reliability on each of the components are compared and the decision is made to change the central operating frequency of the main and test radio signals, the signal with the corresponding command from the output of block 1 is fed to the third input of block 12. channel to the transceiver at the other end of the radio link (to another device). If, if the difference in the reliability values on the side components of the test signal is less than the threshold value, the value of the reliability on the central component of the test signal turns out to be higher / lower by a given threshold value (0.1) of the larger value of the reliability of the side components, the restructuring is not carried out / carried out in the direction of the component with a higher reliability value Рdest.

Thus, the proposed technical solution performs automatic frequency adjustment, which reduces the frequency adaptation of the radio link compared to the known device.

Claims (1)

A radio communication device including a three-channel transceiver (12), the first and second inputs of which are connected to the output of the information signal generator (11) and the output of the pseudo-random sequence generator (13), and the output of the transceiver is connected to the inputs of the filters (8, 9, 10) of the first, central and second components of the test signal, the outputs of which are respectively connected to the inputs of the detectors (5, 6, 7) of the first, central and second components of the test signal, the outputs of which are connected respectively with the inputs of the blocks (2, 3, 4) for assessing the reliability on the first, central and second components of the test signal, the outputs of the blocks for evaluating the reliability are connected to the first, second and third inputs of the control unit (1), respectively, and the output of the control unit (1) is connected to the third input of the transceiver (12).

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