Filter structure for iterative signal processing

摘要

A method is for communicating by tracking time varying channels in a multiple access packet based communication network. Each packet includes a preamble portion including a data symbol, and a data portion including data symbols. The method may include initializing a channel estimate reference from an initial channel estimate based upon the data symbol in a preamble portion of a received packet, and updating the channel estimate reference based upon a channel estimate of a current data symbol and a previously received data symbol from the data symbols in a data portion of the received packet. The method may also include repeating the updating upon receipt of a subsequent data symbol from the data symbols in the data portion of the received packet.

主权项

1. A method of communicating by tracking a plurality of time varying channels in a multiple access packet based communication network, each packet comprising a preamble portion including at least one data symbol, and a data portion including a plurality of data symbols, the method comprising:
initializing a channel estimate reference from an initial channel estimate based upon the at least one data symbol in a preamble portion of a received packet; updating the channel estimate reference based upon a channel estimate of a current data symbol and at least one previously received data symbol from the plurality of data symbols in a data portion of the received packet, the updating comprising
generating the channel estimate for the current data symbol,updating the channel estimate reference based upon the channel estimate for the current data symbol,decoding the current symbol based upon the channel estimate for the current data symbol,updating a channel estimate for a data symbol directly preceding the current data symbol based upon time smoothing data and the channel estimate for the current data symbol, andre-decoding the data symbol directly preceding the current data symbol based upon the updated channel estimate therefor; andrepeating the updating upon receipt of at least one subsequent data symbol from the plurality of data symbols in the data portion of the received packet.