CYCLIC CODE GENERATOR Russian patent published in 2014 - IPC H03M7/02 

FIELD: radio engineering, communication.

SUBSTANCE: circular code generator comprises series-parallel shift register, bit concurrent write inputs of which, beginning with the second, are connected to corresponding data inputs of the device, beginning with the last bit; the control input of the parallel-series mode of the register is connected to the control input of the device; clock and general reset inputs are connected to the clock input and the reset input of the device, respectively; outputs of the last and next-to-last bits of the register are connected to inputs of a first XOR element; the device further includes a NOR element and a second XOR element, the output of which is connected to the concurrent write input of the first bit of the register, and the inputs are connected to concurrent write inputs of the second and most significant bit of the register; inputs of the NOR element are connected to the clock input and the reset input of the device, and the output is the clock output of the device; the output of the first XOR element is connected to the serial write input of the register, the output of the last bit of which is the data output of the device.

EFFECT: generating, at the output of the device, a systematic code in which data items occupy one part of the combination and check items occupy the other part.

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