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Patent Searching and Data


Title:
TRANSMITTER LINEARITY BUILT-IN-SELF-TEST
Document Type and Number:
WIPO Patent Application WO/2019/210874
Kind Code:
A1
Abstract:
An apparatus for testing a circuit includes a source signal input (502) configured to r-eceive a source signal (510), an evaluation signal input (505) configured to receive a-n evaluation signal (506), and a coefficient extractor (512) configured to extract a plu-rality of coefficients of a preselected polynomial representing the evaluation signal (506) and the source signal (510). A weight factor storage (516) contains a plurality of weight factors corresponding to frequency filters. An Adjacent Channel Power Ratio (ACPR) calculator (514) is configured to calculate an ACPR value from the evaluat-ion signal (506) and the source signal (510) by applying the plurality of weight factors from the weight factor storage (516) to the plurality of coefficients, the plurality of weight factors selected according to a main channel frequency range and an adjacent channel frequency range, and determining whether the ACPR value is within an ac-ceptable range and generating a corresponding indication.

Inventors:
JIANG, Hong (5340 Legacy Drive, Suite 175Plano, Texas, 75024, US)
AL-QAQ, Wael (5340 Legacy Drive, Suite 175Plano, Texas, 75024, US)
Application Number:
CN2019/085449
Publication Date:
November 07, 2019
Filing Date:
May 05, 2019
Export Citation:
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Assignee:
HUAWEI TECHNOLOGIES CO., LTD. (Huawei Administration Building, Bantian Longgang Distric, Shenzhen Guangdong 9, 518129, CN)
International Classes:
G01R31/3187; H04B17/00
Foreign References:
US20160087660A12016-03-24
JP2007081731A2007-03-29
US6263289B12001-07-17
EP3297160A12018-03-21
CN207198236U2018-04-06
JP2007089052A2007-04-05
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