BLIND EQUALIZATION SYSTEM AND CONTROL METHOD FOR DECISION DIRECTED ALGORITHM THEREFOR

摘要

PURPOSE: To provide a method for adaptively turning on or off decision directed algorithm(DDA) by the convergence state of data by further reducing the number of decision areas for dividing an I-Q plane where symbol data are arrayed, further accelerating a convergence speed and further suppressing the rate of symbol errors in a blind equalization system used on the reception side of digital communication. ;CONSTITUTION: The respective quadri sected planes of the I-Q plane are divided into the two decision areas and the code of error estimation data e'_n is calculated for the respective areas. When the decision error e_n of the received symbol data Y_n is calculated, matching of the code e_n of the decision error and the code of the error estimation data e'_n is judged. The DDA is executed to the symbol data for which the codes match and an equalization coefficient C_n is updated.;COPYRIGHT: (C)1995,JPO