Apparatus for Receiver with Carrier Frequency Offset Correction Using Frequency Information and Associated Methods
AssigneeSilicon Laboratories Inc.
InventorsAntonio Torrini, Hendricus de Ruijter, Yan Zhou, David Trager
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Abstract
An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that estimates and removes a carrier frequency offset.
Claims21
1-20. (canceled)
A method of processing radio-frequency (RF) signals in an RF receiver using multiple switched antennas, the method comprising:
- detecting a packet;
- estimating and storing a carrier frequency offset (CFO) value;
- and
- averaging CFO values and removing the CFO depending on whether an antenna switch count exceeds a threshold.
A method of processing radio-frequency (RF) signals in an RF receiver using multiple switched antennas, the method comprising:
- (a) detecting a packet;
- (b) estimating and storing a carrier frequency offset (CFO);
- (c) removing phase differences;
- and
- (d) removing non-constant frequency values.
A method of processing radio-frequency (RF) signals in an RF receiver using multiple switched antennas, the method comprising:
- (a) detecting a packet;
- (b) performing an initial frequency calculation;
- (c) nulling antenna switch values;
- (d) estimating and removing a carrier frequency offset (CFO);
- (e) depending on whether an iteration count exceeds a threshold value, changing null points and increasing a number of averaging operations.
Dependencies are inferred from the claim text.