Cross-core calibration in a multi-radio system
AssigneeBroadcom Corporation
InventorArya Behzad
Life of this patent
Estimating the term…
Abstract
A Radio Frequency (RF) transceiver includes a first RF transceiver group, a second RF transceiver group, local oscillation circuitry, and calibration control circuitry. Each of the RF transceiver group has an RF transmitter and an RF receiver. The local oscillation circuitry selectively produces a local oscillation to the first RF transceiver group and to the second RF transceiver group. The calibration control circuitry is operable to initiate calibration operations including transmitter self calibration operations, first loopback calibration operations, and second loopback calibration operations. During loopback calibration operations, test signals produced by an RF transceiver group are looped back to an RF receiver of another RF transceiver group.
Claims31
A Radio Frequency (RF) transceiver comprising:
- a first RF transceiver group having an RF transmitter and an RF receiver;
- a second RF transceiver group having an RF transmitter and an RF receiver;
- local oscillation circuitry operable to selectively produce local oscillations to the first RF transceiver group and to the second RF transceiver group;
- and
- calibration control circuitry operable to initiate calibration operations that include:
- transmitter self calibration operations to determine transmitter calibration settings for the RF transmitter of the first RF transceiver group and for the RF transmitter of the second RF transceiver group;
- first loopback calibration operations during which the RF transmitter of the second RF transceiver group is active and the RF receiver of the first RF transceiver group is active to determine receiver calibration settings for the RF receiver of the first RF transceiver group;
- and
- second loopback calibration operations during which the RF transmitter of the first RF transceiver group is active and the RF receiver of the second RF transceiver group is active to determine receiver calibration settings for the RF receiver of the second RF transceiver group.
A Radio Frequency (RF) transceiver comprising:
- a plurality of RF transceiver groups, each RF transceiver group having an RF transmitter and an RF receiver;
- local oscillation circuitry operable to selectively produce a local oscillation to the plurality of transceiver groups;
- and
- calibration control circuitry operable to initiate calibration operations that include:
- transmitter self calibration operations that determine transmitter calibration settings for the RF transmitters of the plurality of RF transceiver groups;
- a plurality of loopback calibration operations during each of which an RF receiver of a respective RF transceiver group is active, an RF transmitter of another RF transceiver group is active, and receiver calibration settings for the RF receiver of the respective RF transceiver group are determined;
- and
- wherein during the transmitter self calibration operations and during each of the plurality of loopback calibration operations, the local oscillation circuitry is substantially equally loaded.
A method for calibrating a multiple core Radio Frequency (RF) transceiver comprising:
- performing transmitter self calibration operations to determine transmitter calibration settings for RF transmitters of each of a first RF transceiver group and a second RF transceiver group;
- performing first loopback calibration operations during which the RF transmitter of the second RF transceiver group is active and an RF receiver of the first RF transceiver group is active to determine receiver calibration settings for the RF receiver of the first RF transceiver group;
- and
- performing second loopback calibration operations during which the RF transmitter of the first RF transceiver group is active and the RF receiver of the second RF transceiver group is active to determine receiver calibration settings for the RF receiver of the second RF transceiver group.
A method for calibrating a multiple core Radio Frequency (RF) transceiver comprising:
- performing transmitter self calibration operations to determine transmitter calibration settings for RF transmitters of each of a plurality of RF transceiver groups;
- and
- performing a plurality of loopback calibration operations during each of which:
- an RF receiver of a respective RF transceiver group is active;
- an RF transmitter of another RF transceiver group is active;
- and
- receiver calibration settings for the RF receiver of the respective RF transceiver group are determined.
Dependencies are inferred from the claim text.