| 摘要 |
FIELD: radio engineering, in particular, class of opened symbolic synchronizers designed for synchronization with transitions of in-coming symbols in digital receivers. ^ SUBSTANCE: the digital symbolic synchronization device has a matched filter, whose output is connected to the input of a non-linear even order device, narrow-band filter, whose output is connected to the device for determination of the sign of the symbolic frequency clock signal, the narrow-band filter is made up of a subtracting device, delay line for MxN displays, where M-quantity of displays in the symbolic interval of the signal, N-quantity of averaged symbols of the signal, M-leadaway filter with a final pulse characteristic, periodic accumulator consisting of an adder and a delay line for M signal displays, whose input is connected to the output of the adder, and the output - to one of the inputs of the adder, the input of the subtracting device and the input of the delay line for MxN signal displays are connected to the output of the non-linear even order device, the output of the line for MxN signal displays is connected to the other input of the subtracting device, whose output is connected to the input of the M-leadaway filter with a final pulse characteristic, whose output is connected to the periodic accumulator, whose output of the adder serves as the output of the narrow-band filter. ^ EFFECT: simplified realization of the symbolic synchronizer. ^ 1 dwg |
