Method and apparatus to reduce delays in channel estimation
AssigneeNXP B.V.
InventorsNaveen Jacob, Chaithanya Velampalli
Life of this patent
Estimating the term…
Abstract
A signal processor and method of signal processing to reduce delays in channel estimation is described. In the method, the following operations are performed: receiving a signal at a signal processor (200); estimating a first channel from the received signal with a one-dimensional, 1D, frequency filter (304) in a frequency domain to generate an interim output; decoding said interim output (406) to generate decoded interim output; estimating (414,418) at least a second channel from the decoded interim output with a two-dimensional, 2D, filter (100) to produce a final output (420).
Claims13
A method of signal processing to reduce delays in time for channel estimation comprising:
- receiving a signal at a signal processor;
- estimating a first channel from the received signal with a one-dimensional, 1D, frequency filter in a frequency domain to generate an interim output;
- decoding said interim output to generate decoded interim output;
- estimating at least a second channel from the decoded interim output with a two-dimensional, 2D, filter to produce a final output.
A broadcast radio receiver comprising:
- a signal detector;
- a one-dimensional (1D) channel estimator comprising a one-dimensional, 1D, frequency direction filter for filtering a first channel of said signal in a frequency domain, in parallel with a two-dimensional, 2D channel estimator for filtering said first channel in a time and frequency domain, said 1D and 2D channel estimators configured for receiving an input signal from the signal detector to produce an interim output after filtering,
- a switch configured to switch between the output of said 1D and 2D channel estimator for said first channel, so said first channel interim output from can undergo further signal processing;
- an equalizer and/or decoder component connected to said switch for processing said interim output,
- a second two-dimensional, 2D channel estimator connected to said equalizer/decoder and configured to estimate at least a second channel from the decoded interim output,
- and signal output unit connected to said 2D filter to output a final signal from said 2D filter.
Dependencies are inferred from the claim text.