Unlock instant, AI-driven research and patent intelligence for your innovation.

Polar coordinate modulation circuit, polar coordinate modulation method, integrated circuit, and radio transmission apparatus

A technology of polarization modulation and polar coordinates, applied to electrical components, improved amplifiers to reduce nonlinear distortion, power amplifiers, etc., can solve the problems of losing amplitude signal and phase signal synchronization, etc., to suppress the increase of circuit scale and reduce the size of the circuit effect of scale

Inactive Publication Date: 2010-05-19
PANASONIC CORP
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This means that the synchronization between the magnitude signal and the phase signal is lost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polar coordinate modulation circuit, polar coordinate modulation method, integrated circuit, and radio transmission apparatus
  • Polar coordinate modulation circuit, polar coordinate modulation method, integrated circuit, and radio transmission apparatus
  • Polar coordinate modulation circuit, polar coordinate modulation method, integrated circuit, and radio transmission apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0109] The first embodiment of the present invention explains a method of estimating the cause of delay generation by analyzing the operation of the power amplifier unit in the polar modulation circuit, performing synchronization in the predistortion system by specifying the delay generation situation, and ensuring synchronization without using A feedback system for branching the output signal from the power amplifier unit.

[0110] figure 1 is a view showing an example of schematic steps of the polar modulation circuit according to the first embodiment of the present invention. Such as figure 1 As shown in , the polar modulation circuit includes a power amplifier unit 105, a polar coordinate conversion unit 106, an amplitude controller unit 109 composed of an amplitude information correction unit 107 and an amplitude modulation unit 108, a phase information correction unit 110 and a phase modulation unit 111 It consists of a phase modulation signal generation unit 112 , a...

Embodiment approach 2

[0154] The second embodiment of the present invention will explain a circuit configuration capable of reducing the circuit scale compared with the first embodiment of the present invention.

[0155] Image 6 is a view showing an example of a schematic arrangement of a polar modulation circuit according to a second embodiment of the present invention. Such as Image 6 As shown in , the polar modulation circuit includes a power amplifier unit 105, a polar coordinate conversion unit 106, an amplitude controller unit 109 composed of an amplitude information correction unit 107 and an amplitude modulation unit 108, a phase information correction unit 110, a delay adjustment unit 103B The phase modulation signal generation unit 112B, the delay amount determination unit 102 and the memory 101 are composed of the phase modulation unit 111 . In showing the first embodiment of the present invention figure 1 In the polar modulation circuit shown in , instead of the delay adjustment u...

Embodiment approach 3

[0162] The third embodiment of the present invention explains the case where a quadrature modulator is employed as the phase modulation unit in the second embodiment of the present invention.

[0163] Figure 7 is a view showing an example of a schematic arrangement of a polar modulation circuit according to a third embodiment of the present invention. Such as Figure 7 As shown in , the polar modulation circuit includes a power amplifier unit 105, a polar coordinate conversion unit 106, an amplitude controller unit 109 composed of an amplitude information correction unit 107 and an amplitude correction unit 108, a phase information correction unit 110, a delay adjustment unit 103B , the quadrature coordinate conversion unit 113 and the quadrature modulation unit 111C, the phase modulation signal generation unit 112C, the delay amount determination unit 102 and the memory 101 are composed. In showing the second embodiment of the present invention Image 6 In the polar modul...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A polar coordinate modulation circuit, a polar coordinate modulation method, an integrated circuit, and a radio transmitting apparatus wherein the path delay difference between a phase signal and an amplitude signal can be compensated for with high precision in a polar coordinate modulation system, while the increase of the circuit scale being suppressed. A delay amount determining part (102) stores, as table data, the delay amount information, which is based on the step response characteristic of a power amplifying part (105), for the amplitude values of amplitude signals and for transmissionlevel information (S1). In this way, the delay adjustment is performed with an amplitude signal and transmission level information (S1) used as reference signals, whereby the path delay difference between the amplitude signal and the phase signal can be compensated for with high precision, while the increase of the circuit scale being suppressed.

Description

technical field [0001] The present invention relates to a polar modulation circuit, a polar modulation method, an integrated circuit, and a radio transmission device for securing synchronization when combining a phase modulation signal and an amplitude modulation signal in a polar modulation system capable of efficiently realizing a transmitter. Background technique [0002] In recent years, in cellular phone service, since the demand for data communication as well as voice communication has increased, improvement in communication speed is important. For example, generally in GSM (Global System for Mobile Communications), which has become widespread mainly in European and Asian regions, voice communication has been performed with GMSK modulation that shifts a carrier phase according to transmitted data. Further, an EDGE (Enhanced Data Rate for GSM Evolution) system has been proposed in which data communication is performed by 3π / 8 rotating 8-PSK modulation (3π / 8rotating8-PSK...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F1/06H03F3/24
CPCH03F1/0222H03F1/3282
Inventor 清水克人齐藤典昭
Owner PANASONIC CORP