What is 64QAM (64 Quadrature Amplitude Modulation)?

64 QAM is a higher order modulation technique which can modulate 6 bits per symbol of data by manipulating the amplitude and phase of the radio wave for high speed transmission of data. This type of modulation technique is used in LTE and LTE-A pro for high speed data transmission. The parameters that it defines as packet loss, packet delay budget etc.