Patent Number: 8,792,843

Title: Multi-channel RX/TX calibration and local oscillator mismatch mitigation

Abstract: A method and system of optimizing transmit beam forming in a multiple radio wireless system is provided. A stimulus signal can be provided to an analog receive input of a device under test (DUT), wherein the DUT includes multiple radios. A receive phase and amplitude can be measured at baseband using the stimulus signal for each radio. At this point, a receive weight and its conjugate can be determined using the receive phases and amplitudes. A calibration vector and its conjugate can also be determined, wherein a product of the receive weight conjugate and the calibration vector conjugate generate a transmit weight. This transmit weight can be applied to transmit signals during the transmit beam forming using the multiple radios.

Inventors: Breslin; Donald (Sunnyvale, CA), Gilbert; Jeffrey M. (Sunnyvale, CA)

Assignee: QUALCOMM Incorporated

International Classification: H03K 17/74 (20060101); H04B 17/00 (20060101)

Expiration Date: 7/29/12018