Adaptive QAM modulation: Latest technique for wireless communication
Keywords:
OFDM, Adaptive QAM, SNR, Bit error rateAbstract
Adaptive modulation is a method by which the spectral efficiency is improved according to the error
probability of a radio link. Idea of Adaptive Modulation comes into existence after major drawbacks of the fixed
modulation schemes in terms of maximum bandwidth utilization, high bit error rate, and poor performance at high data
rates. QAM is different from other modulation scheme in terms of its higher order form of modulation and more bits of
information per symbol. If the data rate is to be increased then higher order format of QAM are used.