Method and apparatus for providing an efficient pilot scheme for channel estimation
OwnerGiridhar Mandyam, Balaji Raghothaman +1inventors
InventorsGiridhar Mandyam, Balaji Raghothaman, Roy Derryberry
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Abstract
An approach for utilizing a pilot scheme in a spread spectrum communication system (e.g., Multi Carrier Code Division Multiple Access (MC-CDMA)) is provided. A communications link includes a sub-bands and a single pilot channel that is designated for the sub-bands for channel estimation. Pilot symbols transmitted over the single pilot channel are used to determine a first channel estimate associated with a first one of the sub-bands, and a second channel estimate corresponding to a second one of the sub-bands is derived from the first channel estimate.
Claims27
A method of communicating over a spread spectrum system, the method comprising:
- establishing a communications link over the spread spectrum system, the communications link including a plurality of sub-bands and a single pilot channel;
- and
- designating the single pilot channel for the sub-bands,
- wherein data transmitted over the single pilot channel is used to determine a first channel estimate associated with a first one of the sub-bands, and a second channel estimate corresponding to a second one of the sub-bands is derived from the first channel estimate.
A method of communicating over a spread spectrum system, the method comprising:
- generating a pilot symbol used for channel estimation of a communications link within the spread spectrum system, the communications link including a plurality of sub-bands;
- and
- transmitting the pilot symbol over a pilot channel associated with the sub-bands,
- wherein the pilot symbol is used to determine a first channel estimate associated with a first one of the sub-bands, and a second channel estimate corresponding to a second one of the sub-bands is derived from the first channel estimate.
An apparatus for communicating over a spread spectrum system, the apparatus comprising:
- a processor configured to generate a pilot symbol used for channel estimation of a communications link within the spread spectrum system, the communications link including a plurality of sub-bands,
- wherein the pilot symbol is transmitted over a pilot channel associated with the sub-bands, the pilot symbol being used to determine a first channel estimate associated with a first one of the sub-bands, and a second channel estimate corresponding to a second one of the sub-bands is derived from the first channel estimate.
A method of communicating over a spread spectrum system, the method comprising:
- receiving a pilot symbol from a pilot channel common to a plurality of sub-bands of a communications link within the spread spectrum system;
- determining a first channel estimate associated with a first one of the sub-bands;
- and
- determining a second channel estimate corresponding to a second one of the sub-bands from the first channel estimate.
An apparatus for communicating over a spread spectrum system, the apparatus comprising:
- means for receiving a pilot symbol from a pilot channel common to a plurality of sub-bands of a communications link within the spread spectrum system;
- means for determining a first channel estimate associated with a first one of the sub-bands;
- and
- means for determining a second channel estimate corresponding to a second one of the sub-bands from the first channel estimate.
Dependencies are inferred from the claim text.