公开(公告)号：US07451174B2

公开(公告)日：2008-11-11

申请号：US11081182

申请日：2005-03-16

Applicant: Hans-Andrea Loeliger ,  Matthias Urs Frey ,  Patrick Peter Merkli

Inventor： Hans-Andrea Loeliger ,  Matthias Urs Frey ,  Patrick Peter Merkli

IPC: G06G7/00

CPC classification number: H03M13/6597 ,  H03M13/45

Abstract: An analog electronic circuit is proposed that e.g. computes the symbol likelihoods for PAM or QAM signal constellations. The circuit has at least one set of M transistors connected to a common current source. A multiplier/adder generates the voltages to be applied to the transistors from a value y and a set of M expected values in such a way that the currents through the transistors correspond to the likelihood that the value y corresponds to the expected values. The circuit can be used for signal demodulation and various other applications.

Abstract translation: 提出了一种模拟电子电路， 计算PAM或QAM信号星座的符号似然。 该电路具有连接到公共电流源的至少一组M个晶体管。 乘法器/加法器从值y和一组M个期望值产生要施加到晶体管的电压，使得通过晶体管的电流对应于值y对应于期望值的似然性。 该电路可用于信号解调和各种其他应用。