RU2016143251A - METHOD FOR CONDUCTING BILATERAL HIGH-SPEED RADIO COMMUNICATIONS WITH EFFECTIVE USE OF RADIO-FREQUENCY SPECTRUM IN DEPARTMENTAL COMMUNICATION SYSTEM - Google Patents

Claims (1)

A method of conducting two-way high-speed radio communication with efficient use of the radio frequency spectrum in a departmental communication system (BCC), consisting of R identical transceiver kits (PPC), according to which, before starting a duplex communication session, in each PPC there is a receive channel and a transmit channel, alternately connected to the transceiving antenna in the appropriate modes of the control panel “receive” and “transmission”, is tuned to the same receive-transmit frequency for the BCC, and the control panel is set to the initial state - standby “reception” mode, from which any control panel used to call the desired control panel for communication is transferred to the master state, in which a control binary signal of the meander type is generated, with which the control panel is periodically switched from the reception mode to the mode “ transmission ”with a frequency of F = 1 / T _c , where T _c is the duration of one switching cycle“ reception ”-“ transmission ”, which is selected based on the allowable delay of an analog telephone signal converted into digital form, from the moment of its transmission to the moment of its transmission reception with lead and duplex radio communications, as well as on the basis of the capabilities of the used transceiver hardware as part of the control panel, they broadcast the group time-duplex signal (GSVD), modulated by the digital selective calling (PIV) signal, in the form of a sequence of regularly transmitting at the appropriate time intervals “transmission” quanta baseband signal, each of duration T _c / 2, wherein the baseband signal is formed as the OFDM signal consisting of n orthogonal sub-channel signals with a frequency spacing between adjacent n dkanalami equal to Δf = 1 / T _n, where T _gs - duration sending baseband signal and modulating signal DSC is formed as a binary sequence with a coded and periodically repeatable digital location caused to communicate AUC, the rate of formation of binary DSC signal is set to twice higher than the transmission rate of the information binary signal V = 1 / T, where T is the duration of the element of the information binary signal transmitted from the source of the discrete signal, or from the source of the analog signal, digital signal, and the duration of the DSC signal transmission is determined by the time necessary for reliable detection of the address called for communication of the control panel, in addition, in the “leading” control panel for each time interval “transmission”, a time-modulated quantum of the information binary is generated twice a signal of duration T _c / 2 from the corresponding source block of an information binary signal of duration T _c by doubling the speed V of following binary symbols and, at the end of the transmission of the DSC signal, each the generated quantum of the group signal is modulated by the corresponding quantum of the binary information signal for broadcasting the GSVD, modulated by the information signal, while in each other BCC SPC in the initial state, the time position of the regularly following quanta of the received GSVD is determined, and a control binary signal of the meander type is formed, similar to the control signal of the "leading" control panel, in addition, the received quanta of the GSVD demodulate, and that control panel in the demodulated DSC signal of which its address is detected Is set in the state of "slave" and in duplex operation, wherein using the generated "reception" in "transmission" mode control its signal periodically switched mode at a frequency F = 1 / T _u in antiphase relative to the "master" AUC and, similarly to the “leading” control panel, form and transmit to the “leading” control panel at regularly following time intervals “transmitting” quanta of the gas engine, modulated by the information signal of the “slave” control panel, and in opposite to the following time intervals “receiving”, they will take quanta of the gas engine, modulated by information signal of the “leading” PPC, after demodulation of which each quantum of the information binary signal of duration T _c / 2 is expanded in time to the duration T _{c of the} initial block of the information binary signal by halving the binary symbol rate and the restored information binary sequence transmitted by the “leading” »PPC, fed to the input of the receiver of the discrete signal, or decoded and in analog form fed to the input of the receiver of the analog signal, similarly receive After the completion of a duplex communication session, the interacting control panels are set to the initial state, characterized in that in each BCC control panel additionally use K-1 receive channels combined by antenna inputs and connected to the transceiver antenna in the "reception" for simultaneous reception by K independent frequency reception channels P _1, P _2, ..., S _K from each channel to the output voltage terminal receiving P _j with sequence number j = 1, 2, ..., K Dig oic form further work ARIA performed according to the frequency scheduling, whereby each working shift length L hours ARIA continuous operation is split into m slots, each of duration T _i = L / m, where i = 1, 2, ..., m determines the sequence number of each time interval T _i within L hours, and for each time interval T _i allocate the corresponding group of K allowed for communication optimal operating frequencies (ORC) f _1Ti , f _2Ti , ..., f _KTi , each of which f _jTi assign a serial number j = 1, 2, ..., K, coinciding with the serial number of the reception channel P _j tuned to this ORC for operation within the time interval T _i , and each group of K ORC is formed from the corresponding frequency interval Δ _{f Ti} = (0.7-0.9) ⋅f _{MIF Ti} , where f _{MFC Ti} is the maximum applicable frequency over the time interval T _i , determined by the results of short-term forecasting of the conditions of ionospheric propagation of radio waves, while before the beginning of each shift in the electronic memory of each receive channel P _{j of} each SCC BSS is written as beforehand data channels (PPC) receiving m corresponding values of the _RCF f _jT1 , f _jT2 , ..., f _jTm , allowed to work on the corresponding time intervals T ₁ , T ₂ , ..., T _m according to the frequency schedule, and into the electronic memory of the transmission channel of each PPC BCC are recorded as ZPC transmissions of all Q = КЧm values of ORCH according to the frequency schedule, and before each successive time interval T _i occurs, BCC operations simultaneously rebuild all K reception channels P ₁ , P ₂ , ..., P _{K of} each PPC on receiving corresponding K ZPK _{f 1Ti, f 2Ti, ...,} f KTi, etc. Each session duplex or simplex communication, wherein the "master" AUC additionally installed in simplex mode, start by selecting "master" AUC optimal communication frequency (SFN), which is one of K CFP allowed to operate at an appropriate time interval T _i why, in each control panel, an additional device for selecting the optimal communication frequency (UHCO) is additionally used, with which the output voltage levels of each receiving channel P _j are continuously evaluated as in the partial passband Δf of each of the N frequency subchannels of the group signal used in the BCC, and in the total passband ΔF = Δf⋅N of all subchannels of the group signal, and determine the correspondence of each receive channel to one of four conditional categories of receive channels, the first of which includes each receive channel receiving GSVD, the second category includes each receiving channel receiving a group signal of a single-frequency simplex (GSOS), which is formed and emitted by each of two PPCs during a simplex communication session at one frequency in For a continuous group signal modulated either by a binary DSC signal or by an information binary signal, each receiving channel receiving spectrum-concentrated interference whose spectral components fall into the passband of one or more subchannels of a group signal is classified in the third category, and each belongs to the fourth category receiving channel interference receiving normal "white" type of noise, while for the time interval T _i duplex or simplex communication session between any - either by two air force _{control panels} in the “master” _{control panel,} as the SFN, the tuning frequency f _{jTi of} that receive channel P _{j is} selected from all reception channels belonging to the fourth category of reception channels, the output of which determines the minimum level of interference with respect to other reception channels of this category at the same PSP

the transmission channel of the “leading” control panel is also configured, respectively, and for demodulation, the output voltage of the selected receive channel is used, P _j , and when conducting a duplex communication session within the time interval T _i, the required control panel is called for communication by the “leading” control panel at the selected SFN f _jTi GSVD modulated DSC signal, wherein if in every other AUC BCC, located in the initial state is defined only one receive channel P _j, belonging to the receiving channels of the first category, its output signal is demodulated dissolved, and the AUC in the demodulated signal DSC which detected the address, set to the state "slave" and in duplex operation, simultaneously produce rearrangement bearer "slave" AUC at frequency f _jTi adjust the selected reception channel P _j of the AUC and spend duplex communication session on the selected PSD f _jTi, during a simplex call session on the desired PTP communication is performed by transmitting a "master" AUC for the selected PSD f _jTi HSSC modulated binary signal DSC, the DSC signal modulating Fur iruyut analogously signal DSC in duplex mode, but with reduced twice velocity sequence of binary symbols, wherein if in every other AUC BCC, located in the initial state is defined only one receive channel P _j, belonging to the receiving channels of the second category, then its output signal is demodulated, and that PPC, in the demodulated DSC signal of which its address is detected, is considered “slave” and set to simplex mode, at the same time, the transmission channel of the “slave” PPC is _tuned to the frequency f _jTi select of the reception channel P _{j of} this PPC and carry out a simplex communication session on the selected SFN f _jTi , during which each of the interacting PPC transmit and receive GSOS, modulated by the corresponding binary information signal from a discrete signal source, or from an analog signal source converted to digital form, without doubling the speed of the modulating binary characters, in addition, if two or more channels are defined in each BCC control panel in the initial state Since the reception signals pertaining to the reception channels of the first and second categories, then the demodulation of the output signal of each of these reception channels in each control panel is performed sequentially in time, while if one of the reception channels of the BCC during demodulation of the output signal of one of the reception channels П _{j is} detected address with the desired reliability, then the PEP set to the state "slave" and in duplex operation with simultaneous rearrangement of the transmission channel on AUC frequency f _jTi selected reception channel P _j, followed by conducting duplex Seán a communication on that frequency, provided that the selected receive channel n _j corresponds receiving channels of the first category, if the receiving channel corresponding receiving channels of the second category, the "slave" AUC mounted in simplex mode with simultaneous rearrangement of the transmission channel of the AUC at frequency f _{jTi of the} selected receive channel P _j followed by a simplex communication session at this frequency.