In order to do the compensation mode null treatment of the slope, the drift and the offset

摘要

(57) Abstract The manner which treats the signal which is modulated by the information symbol solution is shown the addition Characteristic offset and in order to show the slope clearly. First, first presumption of the offset and the slope is done, hypothesis of all possible values of the information symbol of one or more which is continued next is done. Vis-a-vis each of aforementioned hypothesis, it can use continual ones of the data symbol which it is related in order to do the presumption where the offset and the slope are improved, that offset and the result of the presumption where the slope is improved are stored in each place of aforementioned hypothesis. Vis-a-vis each of aforementioned hypothesis, the aforementioned offset and the slope it can use the result of the presumption which is improved in calculation of expectation of the signal, in addition, aforementioned mismatch with the sample of the signal which is modulated and expectation of the aforementioned signal is calculated. Next, each one of aforementioned hypothesis is expanded at a time one symbol consecutively, the aforementioned slope and the presumption result of the offset are updated, furthermore, aforementioned mismatch being accumulated, generates the transmission path variable for each of the aforementioned hypothesis which is expanded. Next, it is based on the aforementioned transmission path variable, it does the decision in during aforementioned hypothesis, making use of Viterbi simultaneous largest yu degree of u sequence presumption treatment, it generates the hypothesis of the degree of largest yu u of the aforementioned modulation information symbol which is not impaired substantially by the aforementioned addition Characteristic slope and the offset.