Application of Frequency-Pulse Signals for the Synthesis of Interference-Free Digital Radio Devices

Abstract

Using the generalized criterion of fault tolerance of digital information processing devices, the expediency of using frequency-pulse modulation for the construction of fault-resistant logic elements of special purpose has been proved. The synthesis of structural schemes of basic logical elements that use frequency-pulse encoding of information was carried out. Analytical dependences were obtained for determining the values of the auxiliary signals in the case of using n variables. It is shown that for the synthesis of such elements it is necessary to build a combined table, the first and second columns of which display all possible combinations of frequencies of input signals, the third column displays the values of frequencies of output signals. The fourth column displays the sum of the frequencies of the input signals, which are called full intermediate results. The fifth column displays the difference between the full intermediate result and the value of the frequency of the output signal for the corresponding sets of input signals, that is, the deviation functions are determined. The number of different values of this function determines the number of the auxiliary signals, and these different values arethe auxiliary signals. The next two columns display the matching functions. On the basis of which membership functions are built, which, in fact, provide signal filtering. An operator description of the device is built on the basis of the combined table, rejection functions, correspondence table and membership functions.

In this operator description, the F — operator is used, which performs the function of frequency conversion, Ф_в  the  operator performs the function of a high-pass filter, the T — operator performs Ф⁰_с  the function of signal branching, the operator A performs the function of a power adder, the operator performs the function of filtering, which is tuned to the frequency ω₀, Ф¹_с — operator performing the band-pass filtering function, which is tuned to the frequency ω₁. Since the proposed operators and elements that perform their functions make it possible to build logical elements AND, OR, NOT, which are the basis in the case of pulse-potential representation of information, it is concluded that the operators listed above are the basis for the case of chatbot-pulse coding of information .

The processes of signal passage and the principles of operation of AND, OR, NOT radio-pulse logic elements are considered, which makes it possible to draw a conclusion about their efficiency.