Method for constructing multimode quadrature amplitude modulation (QAM) uniform constellation diagram label and modulator

The invention discloses a method for constructing a multimode quadrature amplitude modulation (QAM) uniform constellation diagram label and a modulator. By the method, a uniform label which comprises various 2 QAM square constellation diagrams is constructed, wherein n is a natural number and is mor...

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Bibliographic Details
Main Authors ZHAO LI, WANG GUOZHENG, HUANG CHANGLONG, CAI CHENGLIN, MO JINWANG, CAI KUNHONG
Format Patent
LanguageChinese
English
Published 11.04.2012
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:The invention discloses a method for constructing a multimode quadrature amplitude modulation (QAM) uniform constellation diagram label and a modulator. By the method, a uniform label which comprises various 2 QAM square constellation diagrams is constructed, wherein n is a natural number and is more than or equal to 1; a constellation mapping table generated by the uniform label is stored into a designed constellation mapping module of a multimode QAM modulator, so that the modulator can adaptively finish 2 QAM in different modes according to different control signals; only a uniform constellation mapping table is stored in hardware and all constellation mapping tables containing the modes do not need to be stored respectively during multimode 2 QAM; therefore, during the hardware implementation, the utilization rate of hardware resources is increased; furthermore, switching among different modes of 2 QAM is easy and convenient to control.
Bibliography:Application Number: CN2012104443