Patent ID: 7801209
Filing Date: 2010-09-21
Classification: H04L

Abstract:
1. An equalizer comprising: an N-tap feed forward filter; an M-tap feed backward filter; an L-tap filter; a control unit configured to connect the L-tap filter to the N-tap feed forward filter or the M-tap feed backward filter based on multipath information present in a communications channel; and an accumulator configured to sum output signals from at least one of the N-tap feed forward filter, the M-tap feed backward filter and the L-tap filter and to output a summation result; wherein the control unit is further configured to connect the output port of the L-tap filter to the input port of the N-tap feed forward filter when the multipath information is a long pre-ghost signal, connect the input port of the L-tap filter to the output port of the N-tap feed forward filter when the multipath information is a strong short ghost signal, or connect the input port of the L-tap filter to the output port of the M-tap feed backward filter when the multipath information is a long post-ghost signal.