Invention Grant
- Patent Title: Predistortion for hybrid digital/analog precoders
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Application No.: US16146363Application Date: 2018-09-28
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Publication No.: US10404334B2Publication Date: 2019-09-03
- Inventor: Ronen Shaked
- Applicant: Maxlinear Asia Singapore PTE LTD
- Applicant Address: SG Singapore
- Assignee: Maxlinear Asia Singapore PTE LTD
- Current Assignee: Maxlinear Asia Singapore PTE LTD
- Current Assignee Address: SG Singapore
- Agency: McAndrews, Held & Malloy, Ltd.
- Main IPC: H04B7/0417
- IPC: H04B7/0417 ; H04B7/06 ; H04L25/03 ; H04B7/0456

Abstract:
A 5G base station transmitter at least partially precodes data for beam forming, and generates digital precoded baseband signals. Cross product circuitry coupled to the digital precoder, generates digital cross products of the digital precoded baseband signals. Both the baseband signals and the cross products are put through digital-to-analog converters (DACs), then provided to an analog non-linear precoder. The analog non-linear precoder combines the analog baseband signals, the cross products, with pre-distortion and precoder coefficients to generate a signal that is pre-compensated for power amplifier non-linearity. The pre-compensated signal is amplified by the power amplifier and transmitted via a phased antenna array. The number of extra DACs required for inserting pre-distortion when a hybrid digital/analog precoder is used can be limited to approximately N RF ( N RF - 1 ) 2 , where NRF is the number of outputs of the digital precoder. This is significantly fewer than the number of extra DACs used by other methods.
Public/Granted literature
- US20190044585A1 Predistortion For Hybrid Digital/Analog Precoders Public/Granted day:2019-02-07
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