Patent ID: 7940864
Filing Date: 2011-05-10
Classification: H04L

Abstract:
1. A method of applying a fast algorithm to a channel estimation process, said method comprising: receiving, in a receiver, a signal comprising information bits transmitted in a wireless channel; executing a pilot-based channel estimation process running on a decision-directed turbo estimation procedure having a p structure for a vector of pilots and an upper bound N for a channel spread based on a feedback of detected information bits via Orthogonal Frequency Division Multiplexing (OFDM), wherein said p and said N are integers; encoding said detected information bits; re-encoding said detected information bits at a decoder output after the encoding occurs; re-constructing and subtracting an intercarrier interference (ICI) term from said received signal; modulating said detected information bits after the re-encoding and the re-constructing and subtracting occurs; estimating channel symbols in a per-carrier basis based on a diagonal matrix of a full matrix involved in said pilot-based channel estimation; and performing training of said wireless channel based on an entire vector of said channel symbols.