Configurable non-linear filter for digital pre-distortion

A non-linear filter, digital pre-distortion technology, used in look-up table adaptive pre-distortion, phase feedback adaptive pre-distortion, improving amplifiers to reduce nonlinear distortion, etc.

Pending Publication Date: 2022-05-13
ANALOG DEVICES INT UNLTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, while silicon-based power amplifiers generally offer lower manufacturing costs, some silicon-based power amplifiers compare poorly to their compound semiconductor counterparts in terms of certain performance metrics

Method used

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  • Configurable non-linear filter for digital pre-distortion
  • Configurable non-linear filter for digital pre-distortion
  • Configurable non-linear filter for digital pre-distortion

Examples

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Embodiment Construction

[0062] The following detailed description of the embodiments presents various descriptions of specific embodiments of the invention. However, the invention can be implemented in many different ways. In this specification, reference is made to the drawings, wherein like reference numbers may indicate identical or functionally similar elements. It should be understood that elements shown in the figures are not necessarily drawn to scale. Furthermore, it should be understood that certain embodiments may include more elements than the figures and / or subsets of elements shown in the figures. Furthermore, some embodiments may combine features from two or more figures in any suitable combination.

[0063] As mentioned above, devices for power amplifiers can be based on a variety of different semiconductor material systems. For example, some power semiconductor devices are based on silicon technology, such as Si-based laterally diffused metal oxide semiconductor (LDMOS) devices, wh...

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Abstract

The invention relates to a configurable non-linear filter for digital pre-distortion. Some embodiments herein describe a radio frequency communication system that may include a transmitter that outputs a radio frequency (RF) transmit signal, the transmitter including a digital pre-distortion system (DPD) that pre-distorts the RF transmit signal. The DPD system may include a configurable non-linear filter, such as a Laguerre filter, having a plurality of rows, where at least one row operates at a configurable decimation ratio. The DPD system may also include dividers and a crossbar switch coupled between the dividers.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 198,530, filed October 26, 2020, entitled "CONFIGURABLE NON-LINEAR FILTERFOR DIGITAL PRE-DISTORTION," the contents of which are incorporated herein by reference in their entirety. technical field [0003] The disclosed technology relates generally to radio transceivers, and more particularly to digital predistortion (DPD) techniques that compensate for charge trapping effects in power amplifiers. Background technique [0004] Radio transceivers are used in a variety of radio frequency (RF) communication systems. For example, transceivers may be included in base stations or mobile devices to transmit and receive signals associated with a variety of communication standards, including, for example, cellular and / or wireless local area network (WLAN) standards. Transceivers may also be used in radar systems, instrumentation, industrial electroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02H03F1/32H03F3/24
CPCH03H17/0226H03H17/0294H03F1/3247H03F3/245H03H2017/009H03F1/3258H03F2201/3231H03F2201/3233H03F3/195H03F2200/451H04B2001/0425H04B1/0475H04B1/62H04B1/04H03F1/3241H03H17/045H04B2001/0408H03F1/3276H04B2001/0433H04L27/368
Inventor A·文基塔苏布拉曼尼S·萨默菲尔德B·穆拉里克里沙纳P·钱德拉塞卡兰
Owner ANALOG DEVICES INT UNLTD
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