Apparatus of maximum likelihood signal detection
AssigneeMediatek Incorporation
InventorsPi-Hau Liu, Meng-Ta Yang
Life of this patent
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Abstract
An apparatus for maximum likelihood signal detection comprises a reference data unit, a branch metric unit, an add-compare-select unit, a path metric unit and a path memory, and is used for detecting maximum likelihood signal. The reference information unit, the branch metric unit, the add-compare-select unit or the path metric unit can further comprise a multiplexer to removing unnecessary paths according to a control signal. The control signal is adjusted according to channel response, coding constraint or channel memory length.
Claims17
An apparatus for maximum likelihood signal detection comprising:
- a reference information unit for generating a reference signal;
- a branch metric unit for receiving an input signal and the reference signal to generate a first branch metric, wherein the branch metric unit comprises:
- a branch meter for generating a second branch metric according to the input signal and the reference signal;
- and
- a multiplexer for outputting the second branch metric or a predetermined branch metric to be the first branch metric according to a control signal;
- an add-compare-select unit for receiving the first branch metric and performing addition, comparison and selection actions to generate a survival path metric and a determination result signal;
- a path metric unit for storing the survival path metric;
- and
- a path memory for storing a path data according to the determination result signal.
An apparatus for maximum likelihood signal detection comprising:
- a reference information unit for generating a first reference signal, wherein the reference information unit comprises:
- a reference signal generator for generating a second reference signal according to an input signal;
- and
- a multiplexer for outputting the second reference signal or a predetermined reference signal to be the first reference signal according to a control signal;
- a branch metric unit for receiving the input signal and the first reference signal to generate a branch metric;
- an add-compare-select unit for receiving the branch metric and performing addition, comparison and selection actions to generate a survival path metric and a determination result signal;
- a path metric unit for storing the survival path metric;
- and
- a path memory for storing a path data according to the determination result signal.
An apparatus for maximum likelihood signal detection comprising:
- a reference information unit for generating a reference signal;
- a branch metric unit for receiving an input signal and the reference signal to generate a first branch metric;
- an add-compare-select unit for receiving a second branch metric and performs addition, comparison and selection actions to generate a survival path metric and a determination result signal, wherein the add-compare-select unit further comprises:
- a multiplexer for outputting the first branch metric or a predetermined input value to be the second branch metric according to a control signal;
- a path metric unit for storing the survival path metric;
- and
- a path memory for storing a path data according to the determination result signal.
An apparatus for maximum likelihood signal detection comprising:
- a reference information unit for generating a reference signal;
- a branch metric unit for receiving an input signal and the reference signal to generate a branch metric;
- an add-compare-select unit for receiving the branch metric and performing addition, comparison and selection actions to generate a survival path metric and a determination result signal;
- a path metric unit for storing the survival path metric, wherein the path metric unit comprises:
- a path metric memory storing the survival path metric;
- and
- an multiplexer outputting the stored survival path metric or a predetermined path metric to the add-compare-select unit according to a control signal;
- and
- a path memory for storing a path data according to the determination result signal.
Dependencies are inferred from the claim text.