SU769752A2 - Device for analysis of channel state with automatic adjustable threshold - Google Patents

Description

The drawing shows an electrical circuit of the proposed channel state analysis device with automatically controlled horny.

The channel state analysis device with an automatically adjustable threshold contains error detector 1, unit 2 of the main reversible counter, generator 3 units, dividers 4 and 5, circuit 6 OR, block 7 auxiliary reversible counter, multipliers 8 and 9, counter 10 time intervals, total operating time counter 11, operating ratio indication unit 12, control unit 13.

The device for analyzing the state of the channel with an automatically adjustable threshold works as follows.

When the detector 1 arrives at the pulse signals, distorted above the permissible value, elementary parcels appear at its output, arriving at the inputs of blocks 2 and 7. The first such package starts block 2, which, in turn, impulses to the input of the block 13, opens the input of the counter 10 with a certainty lower than the predetermined and for the length of time required to restore the disconnected communication channel. In block 2, a sequential analysis of the incoming signals from detector 1 and circuit 6 is performed.

If the difference between the number of incoming signals within a certain time is less than a predetermined value, then a pulse (for example, a positive) appears at the output of block 2, which sets block 2 and counter 10 to the initial state. Thereafter, the analysis process begins again. If the difference between the numbers of incoming signals exceeds the set value, then the output of block 2 is a pulse (for example, negative), which enters block 13, as a signal to reject the communication channel. The signal of rejection of the communication channel is also with 1 signal of the prohibition of analysis in block 2. The analysis is prohibited so that in the process of rebuilding the radio link or automatically replacing the failed element of the backup unit, block 13 does not receive a signal of rejection of the radio channel and also to exclude the situation when the radio lines were spawned for the optimal frequency of radio reception and sub-wave, and the information accumulated during the restructuring in block 2 about the radio channel's incorrect state will be output by the time the reorganization ends in block 13 as a signal ala rejection.

At the end of the process of restoring the radio channel from the output of block 13 to the input of counter 10, a control signal is received, according to which counter indications 10 are copied to block 12. Counter 10 is reset, and in block 2, the command of block 13 is removed. The threshold level of block 2 formed by circuit 6 is automatically adjusted in accordance with the frequency change of units in the sequence coming from detector 1 to block 7. In block 7, the analysis duration in the area of uncertain points is increased when the frequency values of units; 1 in the sequence at both inputs of block 7 are close to each other.

With an increase in the difference between the frequencies, the analysis time in block 7

decreases, which causes a more frequent pulse appearance at one of its outputs. Using multipliers 8 and 9, each of the pulses from the outputs of block 7 is converted into a series of pulses that determine the variable component of the threshold level of block 2, which with the help of circuit 6 is combined with a constant component of the divider 4. Input of dividers 4 and 5 a pulse clock frequency signal is received from generator 3. The threshold value of the analysis duration until a decision is made that the channel is suitable or unsuitable as a function of the value of the reliability loss in the channel is determined by selecting the values of the coefficients laziness dividers 4 and 5 and respective coefficients of multipliers 8 and the generator E. From 3 iodayuts continuous clock pulses to the inputs of counters 10 and

11 respectively. In counter 11, a total pulse count is made during the channel operation time. The clock pulses, corresponding to the unsuitability and restoration time of the channel and the total time of its use, are received respectively at the inputs of block 12, where the channel efficiency factor is determined and the results of the channel performance evaluation for the session are displayed on the light board with the possibility of their subsequent operation. for a certain period of time.

The proposed channel state analysis device with an automatically adjustable threshold, providing an automatic measurement of the operable ratio of adaptive radio links, for any period of time allows the instrument to

accuracy without manual operations to make a comparative assessment of the effectiveness of the functioning of various algorithms of adaptive radio links, to reveal the best of them, to evaluate the effectiveness of

in them changes.

Claims (1)

1. USSR author's certificate jVo 370735, cl. And 04 L 1/10, 1971 (prototype).