Digital pre-distortion for multiple-power amplifier transceivers
US-2024429953-A1 · Dec 26, 2024 · US
Methods and apparatus for performing digital predistortion using time domain and frequency domain alignment
US9036734B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-9036734-B1 |
| Application number | US-201313947620-A |
| Country | US |
| Kind code | B1 |
| Filing date | Jul 22, 2013 |
| Priority date | Jul 22, 2013 |
| Publication date | May 19, 2015 |
| Grant date | May 19, 2015 |
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Abstract
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Integrated circuits with wireless communications circuitry having digital predistortion (DPD) circuitry are provided. The digital predistortion circuitry may include a forward path filter, a time domain alignment (TDA) circuit, a frequency domain alignment (FDA) circuit, and an adaption circuit. The TDA circuit may receive power amplifier input signals and power amplifier output signals and may include a cross correlator, a peak detector, and a delay circuit for performing coarse time domain alignment (i.e., to align the power amplifier input and output signals). The FDA circuit may include a fast Fourier transform circuit, a matrix multiplier, and a matrix inverter for performing frequency domain alignment. The adaption circuit may analyze the aligned signals output from the FDA circuit to produce impulse response coefficients that are then used to control the forward path filter. The forward path filter may serve to predistort transmit signals prior to radio-frequency amplification.
First claim
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What is claimed is: 1. An integrated circuit, comprising: a time domain alignment circuit that is configured to perform time domain alignment operations; and a frequency domain alignment circuit that is coupled to the time domain alignment circuit that is configured to perform frequency domain alignment operations and that includes a matrix inversion circuit that performs matrix inversion operations. 2. The integrated circuit defined in claim 1 , wherein t…
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- H04B1/0475Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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- What does patent US9036734B1 cover?
- Integrated circuits with wireless communications circuitry having digital predistortion (DPD) circuitry are provided. The digital predistortion circuitry may include a forward path filter, a time domain alignment (TDA) circuit, a frequency domain alignment (FDA) circuit, and an adaption circuit. The TDA circuit may receive power amplifier input signals and power amplifier output signals and may…
- Who is the assignee on this patent?
- Altera Corp
- What technology area does this patent fall under?
- Primary CPC classification H04B1/0475. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue May 19 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).