Base band processing type phase comparison soft discriminating circuit
专利汇可以提供Base band processing type phase comparison soft discriminating circuit专利检索，专利查询，专利分析的服务。并且PURPOSE:To use only two phase detectors and low-pass filters, to attain ease of phase adjustment and also to simplify the constitution by using the orthogonal phase detectors and obtaining phase information to a required phase through the vector synthesis at a base band. CONSTITUTION:After a received digital phase modulation signal inputted from an input terminal 11 is subjected to orthogonal phase detection by a reference carrier from a terminal 12, noises are eliminated from the result by the low-pass filters 3a, 3b and orthogonal phase detected outputs are obtained. On the other hand, an output of, e.g., the low-pass filter 3a is inputted to a soft discrimination coding logical circuit 14 as phase information to a phase of sin phi through a comparator 4a. The output of the filters 3a, 3b is inputted simultaneously to an adder 18 and a subtractor 19 at an identical level, they are inputted to the soft discrimination coding logical circuit 14 via comparators 3a, 3b as phase information to the phase of sin (phi+pi/4) and sin (phi-pi/4), they are converted logically and outputted from an output terminal 16 according to the timing of the sampled pulse inputted from a terminal 15 as a 2-bit soft discrimination output.，下面是Base band processing type phase comparison soft discriminating circuit专利的具体信息内容。
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