Data processing method
AssigneeNokia Corporation
InventorTeemu Sipila
Life of this patent
Estimating the term…
Abstract
A suboptimal method for searching for a symbol sequence, the method comprising the steps of: determining a channel impulse response; sampling a received signal; selecting at least one of the highest and/or most reliable impulse response values; determining a reference signal using at least one impulse response value and a symbol sequence assumed as transmitted; determining differential terms corresponding to the selected impulse response values for the signal sample and the reference signal; using the determined differential terms in a transition metric for searching for a symbol sequence; forming a survivor path by adding the symbol sequence provided by the transition metric to the survivor path formed so far.
Claims26
A suboptimal method for searching for a symbol sequence, comprising:
- determining a channel impulse response;
- sampling a received signal;
- selecting at least one of the highest and/or most reliable impulse response values;
- determining a reference signal using the at least one impulse response value and a symbol sequence assumed as transmitted;
- determining differential terms corresponding to the selected impulse response values for the signal sample and the reference signal;
- applying the determined differential terms to a symbol sequence transition metric for searching for a symbol sequence;
- forming a survivor path by adding the symbol sequence provided by the transition metric to the survivor path formed so far.
A receiver in which a symbol sequence is searched for;
- the receiver comprises
- means for determining a channel impulse response,
- means for sampling a received signal;
- means for selecting at least one of the highest and/or most reliable impulse response values;
- means for determining a reference signal using the at least one impulse response value and a symbol sequence assumed as transmitted;
- means for determining differential terms corresponding to the selected impulse response values for the signal sample and the reference signal;
- means for using the determined differential terms in a transition metric for searching for a symbol sequence;
- means for forming a survivor path by adding the symbol sequence provided by the transition metric to the survivor path formed so far.
Dependencies are inferred from the claim text.