Power Saving Apparatus and Method of Multiple-Antenna Receiver with Variable Rate
AssigneeRealtek Semiconductor Corp.
InventorsDer-Zheng Liu, Jiun-Hung Yu, Kuang-Yu Yen
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Abstract
A multiple-antenna receiver can enable and disable receive radio frequency front-end and analog front-end circuits of specific antenna receiving routes according to a predetermined scheme during the receive data phase. The predetermined scheme calculates signal quality indices of the receiving route antennas by means of a preamble sequence, and derives the modulation and coding scheme and the number of spatial streams via the information provided by a header sequence. Indications of the signal quality indices are compared with threshold values to determine which receiving routes are to be turned on and which receiving routes are to be turned off.
Claims20
A method for receiving a data frame with a multiple-antenna apparatus, said data frame comprising a non-data sequence and a data sequence, said method comprising the steps of:
- entering a state for receiving said non-data sequence and turning on N receiving routes to receive said non-data sequence of said data frame;
- and
- entering a state for receiving said data sequence and turning on M of said N receiving routes to receive said data sequence of said data frame, wherein M is less than N.
An apparatus for receiving a data frame comprising a non-data sequence and a data sequence, said apparatus comprising:
- N receiving routes;
- wherein, in a first state, said N receiving routes are turned on to receive said non-data sequence of said data frame;
- and
- wherein, in a second state, M of said N receiving routes are turned onto receive said data sequence of said data frame, and N-M of said N receiving routes are turned off, wherein M is less than N.
Dependencies are inferred from the claim text.