Symbol tracking for AM in-band on-channel radio receivers
AssigneeiBiquity Digital Corporation
InventorsBrian William Kroeger, Kun Wang
Life of this patent
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Abstract
A method for symbol tracking in AM in-band on-channel radio receivers comprises the steps of: receiving a stream of time domain samples; assembling a set of the time domain samples equal to a symbol time plus a half symbol delay in response to a symbol timing adjustment value for each symbol period; interpolating the time domain samples; partitioning the interpolated time domain samples into a first group of samples representing half-off symbols and a second group of samples representing on-time symbols; processing the first and second groups of samples to produce the symbol timing adjustment value; and outputting the second group of samples representing on-time symbols at a symbol rate. An apparatus that performs the method is also included.
Claims20
A method for symbol tracking in AM in-band on-channel radio receivers, the method comprising the steps of:
- receiving a stream of time domain samples;
- assembling a set of the time domain samples equal to a symbol time plus a half symbol delay in response to a symbol timing adjustment value for each symbol period;
- interpolating the time domain samples;
- partitioning the interpolated time domain samples into a first group of samples representing half-off symbols and a second group of samples representing on-time symbols;
- processing the first and second groups of samples to produce the symbol timing adjustment value;
- and
- outputting the second group of samples representing on-time symbols at a symbol rate.
An apparatus for symbol tracking in AM in-band on-channel radio receivers, the apparatus comprising:
- an input for receiving a stream of time domain samples;
- a processor for assembling a set of the time domain samples equal to a symbol time plus a half symbol delay in response to a symbol timing adjustment value for each symbol period, interpolating the time domain samples, partitioning the interpolated time domain samples into a first group of samples representing half-off symbols and a second group of samples representing on-time symbols, and processing the first and second groups of samples to produce the symbol timing adjustment value;
- and
- an output for outputting the second group of samples representing on-time symbols at a symbol rate.
Dependencies are inferred from the claim text.