| 摘要 |
A device for detection and measurement of Doppler signals comprises the first and the second keys combined inputs of which are the input of the device, first NOTgate input of which is connected to the output of the control block and is the control input of the second key, and the output is the control input of the first key, output of the second key is the input of the first delay block output of which is combined with the output of the first key and is the input of the second delay block and second input of multiplier of complex numbers the first input of which is the output of the second delay block. The first quadrature channel from the output of the second delay block is connected to the input of the multiplier of complex numbers directly, and the second one – through first inverter. Output of the multiplier of complex numbers is the input of averaging block output of which is connected to the input of the phase calculation block and to the input of combination block. The output of the block for phase calculation is connected to the second input of the subtraction block to the first input of which the output of the delay element is connected, its input is as well the output of the block for phase calculation. The output of the subtraction block is connected to the combined inputs of the third and the second keys control inputs of which are connected to the output of the control block: the third key – through the second NOT gate, and the fourth key – directly, the output of the fourth key is the input of the second inverter output of which is connected to the input of the fifth key to which the output of the third key is connected as well. The control input of the fifth key is the output of the threshold device that is the first output of the device for detection and measurement of Doppler signals. The first input of the threshold device is the output of the combination block, and the second input – the output of the first memory element, the output of the fifth key is the first input of the multiplier, the second input of that one is the output of the second memory element. After the multiplier the first and the second blocks for correction of estimation of radial velocity and block of adder-averager are included, the first inputs of the first and the second blocks of correction of estimation of radial velocity are the output of the block of phase estimation and the output of the delay block, respectively, and the second inputs – the output of multiplier, outputs of the first and the second block of correction of estimation of radial velocity are the first and the second inputs of the adder-averager, and the output of this block is the second output of the device for detection and measurement of Doppler signals. |
