Accession Number : ADD010629

Title :   Least Squares Lattice Decision Feedback Equalizer.

Descriptive Note : Patent,


Personal Author(s) : Shensa,M J ; Satorius,E H ; Pack,J D

Report Date : 01 Mar 1983

Pagination or Media Count : 10

Abstract : An improved equalizer receives the output of a data transmission channel at the first stage of a number of successfully coupled lattice stages which are each made up of a selected configuration of adjustable electrical components. A subtractor device is coupled to the lattice stages for providing a succession of error terms. The error terms are an accumulation of the squares of a number of error quantities, which are the differences between a sequence of undistorted training signals or estimates of the transmitted signal which are received by the subtractor device, and the same training signals after they have travelled through the data transmission channel. A delayed stage and two dimensional vector matrices are coupled in each of the lattice stages for iteratively adjusting their components in accordance with a least squares procedure, that is, the components are adjusted each time a signal is received and the iterative adjustment continues until a prespecified error limit is reached. (Author)

Descriptors :   *Patents, Equalization, Data transmission systems, Least squares method, Error analysis, Matrices(Mathematics), Two dimensional, Iterations, Delay lines, Data rate, Input output processing

Subject Categories : Statistics and Probability
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE