Linearization of intermodulation bands for concurrent dual-band power amplifiers

A dual-band, frequency-band technology, applied in the field of linearization of intermodulation frequency bands for concurrent dual-band power amplifiers, can solve problems such as impossibility and high cost

Active Publication Date: 2016-01-06
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, filtering these out-of-band intermodulation products through analog filters is challenging, costly or simply impossible from a system perspective

Method used

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  • Linearization of intermodulation bands for concurrent dual-band power amplifiers
  • Linearization of intermodulation bands for concurrent dual-band power amplifiers
  • Linearization of intermodulation bands for concurrent dual-band power amplifiers

Examples

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Embodiment Construction

[0046] The following examples set forth the information necessary to allow one skilled in the art to practice the embodiments and illustrate the best mode for practicing the embodiments. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not expressly addressed herein. It should be understood that these concepts and applications are within the scope of the disclosure and the appended claims.

[0047] Embodiments of the present disclosure relate to digital predistortion for concurrent multi-band transmitters that configure separate digital predistorters for each band with a single adapter and the same set of predistortion coefficients. Before discussing the embodiments of the present disclosure, the discussion utilizes such as figure 2 The concurrent dual-band transmitter 10 of the conventional dual-band predistortion base...

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Abstract

Systems and methods are disclosed for digital predistortion for a concurrent multi-band transmitter that compensates for both in-band and out-of- band intermodulation products according to a memory polynomial based baseband model. In one embodiment, a concurrent multi-band transmitter includes a digital predistortion subsystem, power amplifier circuitry, and an adaptation subsystem. The digital predistortion subsystem includes multiple digital predistorters configured to process digital input signals for frequency bands of a concurrent multi-band signal to provide predistorted digital input signals each being for a different one of the frequency bands of the concurrent multi-band signal and one or more intermodulation distortion compensation signals each being for a different one of one or more intermodulation distortion frequency bands. The adaptation subsystem is configured to adaptively configure the plurality of digital predistorters according to a memory polynomial based digital baseband model of the digital predistorters.

Description

[0001] related application [0002] This application is a continuation of U.S. Patent Application Serial No. 13 / 969858, filed August 19, 2013, entitled "Low Complexity Digital Predistortion for Concurrent Dual-Band Transmitters," claiming 2013 Priority to US Provisional Application Serial No. 61 / 826060, filed May 22, the disclosures of which are hereby incorporated by reference in their entirety. technical field [0003] This disclosure relates to digital predistortion for concurrent multiband transmitters. Background technique [0004] In many modern applications, it is desirable to have a concurrent multiband transmitter capable of transmitting concurrent multiband signals. As used herein, a concurrent multi-band signal is a signal that occupies multiple different frequency bands. More specifically, a concurrent multi-band signal contains frequency components that occupy different contiguous bandwidths for each of the multiple frequency bands. A concurrent multiband sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/00H03F1/32H04B1/04H04B1/62
CPCH04B1/0475H03F1/3241H03F1/3247H03F1/34H03F3/24H03F2200/111H04B1/0053H04B1/0067H04B1/0483H04B1/62H04B2001/0425H04B2001/0433
Inventor P-A.拉波特M.E.罗林斯曹海鹰
Owner TELEFON AB LM ERICSSON (PUBL)
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