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Many iterative techniques are available to solve normal equations appearing in the linear least-squares (LS) problem. However, because of multiplications and divisions they cannot be effectively implemented in real time. A novel multiplication-free and division-free iterative technique, the dichotomous co-ordinate descent algorithm, which guarantees convergence to the true solution under realistic assumptions, is proposed.
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Zakharov et al. (2004) studied this question.
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