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Systems, methods, and apparatuses for linear polar transmitters

A linear polarization, transmitter technology, used in synchronization/start-stop systems, climate sustainability, sustainable buildings, etc., can solve problems such as amplifier limitations, reduce the stability of polarization loop systems, and achieve the effect of large bandwidth

Inactive Publication Date: 2007-12-19
SAMSUNG ELECTRO MECHANICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this feedback control structure, an accurate receiver must be included in the transmitter, and the control loop bandwidth should greatly exceed the signal bandwidth
Furthermore, the intrinsic gain-reducing characteristic in negative feedback can cause severe constraints on amplifiers without sufficient transmit gain
In addition, the traditional polarization loop system feeds back distortion and signal power, which reduces the stability of the polarization loop system

Method used

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  • Systems, methods, and apparatuses for linear polar transmitters
  • Systems, methods, and apparatuses for linear polar transmitters
  • Systems, methods, and apparatuses for linear polar transmitters

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Embodiment Construction

[0022] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, these inventions may take many forms and are not limited to the embodiments set forth herein; rather, these embodiments are provided only to enable this application to satisfy legal requirements. Throughout, the same reference numerals denote the same elements.

[0023] Embodiments of the present invention may provide linearly polarized transmitters based on polar modulation techniques using two corresponding channels for amplitude and phase and analog quadrature recursive predistortion linearization techniques. Polar modulation technology can improve battery life by dynamically adjusting the bias level of the power amplifier. Furthermore, analog quadrature recursive predistortion can provide substantially instantaneous correction for amplitude and phase errors in radio frequency (RF) ...

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Abstract

The invention provides systems, methods and apparatuses for linear envelope elimination and restoration transmitters, based on the polar modulation operation combined with the orthogon recursive predistortion. The polar modulation technique dynamicly regulates bias level to increase battery life. Moreover, the analogy orthogon recursive predistortion corrects amplitude and phase errors in a radiofrequency (RF) power amplifier (PA) effectively, enhances PA output capability. Even-order distortion components are used for predistortion of input signals by means of multiplication, improve effective correcting bandwidth. Moreover, the predistortion proposal of a temporary feedback envelope distortion signal allows to correct any distortion of correcting loop bandwidth including envelope memory effect.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application No. 60 / 803,871, filed June 4, 2006, and entitled "Systems, Methods, and Apparatus for Linearly Polarized Transmitters," the contents of which are hereby incorporated by reference in their entirety . technical field [0003] The present invention relates generally to linearly polarized transmitters and, more particularly, to systems, methods and apparatus for performance enhancement of radio frequency (RF) power amplifiers. Background technique [0004] In cost-sensitive mobile transmitters, performance tradeoffs must be carefully managed to achieve high efficiency and high output power with the required gain and linearity. For an intrinsically nonlinear power amplifier (PA) itself, the only way to achieve better linear operation is to limit the dynamic range of the signal to a fraction of the full capability of the PA. Unfortunately, this limitation in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49
CPCY02B60/50
Inventor 禹王命李彰浩张在浚金学善
Owner SAMSUNG ELECTRO MECHANICS CO LTD