Power control on a packet-by-packet basis in a CMOS transceiver
AssigneeAtheros Communications, Inc.
InventorBrian J. Kaczynski
Life of this patent
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Abstract
A transceiver includes a power control circuit in the transmitter that operates on a packet-by-packet basis. The transceiver can, for each packet, set a variable gain amplifier to a first gain and use predetermined gain increments to thereafter increase gain until a gain hold event. The gain hold event can be an expiration of a time duration allocated for changing gain or a desired power being reached, whichever event occurs first. The gain can be adjusted by a predetermined amount based on an operating condition.
Claims18
A method of transmitting packets, the method comprising:
- determining whether an output power of a power amplifier reaches a desired power when transmitting a packet;
- increasing a gain of a variable gain amplifier (VGA) by a predetermined increment when the output power does not reach the desired power;
- repeating determining and increasing the gain until a gain hold event, the gain hold event being first of a time duration allocated for changing gain expiring and the desired power being reached,
- wherein the VGA uses a gain associated with the gain hold event to transmit a remainder of the packet.
A method of transmitting packets, the method comprising:
- for an initial packet, setting a variable gain amplifier (VGA) to an initial gain and using predetermined gain increments to thereafter increase gain until a gain hold event;
- and
- for subsequent packets, setting the VGA to a gain associated with the gain hold event of a last transmitted packet and using the predetermined gain increments to thereafter increase gain until the gain hold event,
- wherein the gain hold event is one of a time duration allocated for changing gain expiring and a desired power being reached, whichever occurs first.
A method of transmitting packets, the method comprising:
- for each packet, setting a variable gain amplifier (VGA) to a first gain and using predetermined gain increments to thereafter increase gain until a gain hold event,
- wherein the gain hold event is one of a time duration allocated for changing gain expiring and a desired power being reached, whichever occurs first.
A method of transmitting packets, the method comprising:
- on a packet-by-packet basis, setting a variable gain amplifier (VGA) to a first gain and using predetermined gain increments to thereafter increase gain until a gain hold event,
- wherein the gain hold event is one of a time duration allocated for changing gain expiring and a desired power being reached.
Dependencies are inferred from the claim text.