FIELD: physics, radio.
SUBSTANCE: invention is related to radio communication and may be used in systems for transmission of discrete information that function in unfavourable noise environment. Method provides introduction of redundancy into initial binary sequence (BS) on transmitting side, and on receiving side - introduction of initial BS restoration. Redundancy is introduced by generation of ternary code symbols that carry information on position of current bit in block of zeros or block of units. If symbol of ternary code defines odd position of bit in block of units or in block of zeros, then carrying oscillation is modulated by parameter that differs by value for block of units and block of zeros. If it defines even position - then by the third value. The first two values of parameter carry information about unit and zero accordingly. The third value - about repetition of initial BS current bit. Arriving signals are demodulated by method that corresponds to type of modulation. Values of modulation parameters are defined. Symbols of ternary code are restored by values of parameters. For this purpose every symbol of ternary code is transformed into three bits, from bits of appropriate positions three BS are formed. Units of the first and second BS correspond to bits of initial BS that occupy odd positions. Units of the third BS correspond to bits that occupy even positions. Using bits of the first two BS initial BS is restored. Bits of the third BS serve for synchronisation of reception process.
EFFECT: increase of throughput capacity of radio communication lines and simplicity of realisation.
1 dwg, 1 tbl
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Authors
Dates
2009-02-27—Published
2006-09-12—Filed