Method and apparatus of signal estimation over generalized fading channel
AssigneeTexas Instruments Incorporated
InventorsTao Luo, Young-Chai Ko
Life of this patent
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Abstract
A methodology of signal estimation over the generalized fading channel can be applied to any parameter whose dB value is required to be estimated. The estimator is shown to be asymptotically efficient in a number of samples and the amount of fading. Theoretical and simulation results confirm that the SINR estimator implemented using the methodology outperforms the sample-average estimator, which is currently used in most of systems and robust to the channel variation.
Claims23
A method of signal estimation over a generalized fading channel, the method comprising the steps of:
- averaging an input signal via a first averaging filter to generate a first averaged output signal;
- filtering the first averaged output signal via a first log filter to generate a first log domain value;
- scaling the first log domain value by a first constant;
- filtering the input signal via a second log filter to generate a second log domain value;
- averaging the second log domain value via a second averaging filter to generate a second averaged output signal;
- scaling the second averaged output signal by a second constant;
- and
- summing the second averaged output signal with the scaled first log domain value to generate an estimated signal over the generalized fading channel.
A wireless communication system comprising:
- a first signal averaging filter configured to average an input signal there through;
- a first log filter configured to generate a first log domain value in response to the averaged input signal;
- a first scaling element configured to scale the first log domain value by a first constant;
- a second log filter configured to generate a second log domain value in response to the input signal;
- a second signal averaging filter configured to average the second log domain value there through;
- a second scaling element configured to scale the averaged second log domain value by a second constant;
- and
- a summing element configured to add the scaled first log domain value and the scaled averaged second log domain value to generate an estimated signal over a generalized fading channel in response to the input signal.
Dependencies are inferred from the claim text.