An improved K-means clustering algorithm for demodulation of distorted QAM signals
Wireless network nodes and mobile devices are always constrained by power,dimension and price in the shortrange wireless communication system.Thus,it's impossible for them to use some complex methods such as pre-distortion and compensation to restrain the nonlinear effects caused by power amplifier,which is one of the important reasons why the high order QAM could not be used in uplink.Based on the characteristics of QAM rectangular constellation,an improved K-means clustering algorithm is presented to be the demodulation algorithm of high order QAM.It has better demodulation performance and lower computational complexity.
demodulation of high order QAMK-means clustering algorithmnonlinearity of PA
NETL
NSTL
万方数据
维普
