High Speed Packet Access had twelve categories most with a 16-QAM (modern telecommunications to transmit information.) Modulation.
12 16-QAM 16-QAM 16-QAM 16-QAM 16-QAM 16-QAM 16-QAM 16-QAM 16-QAM 16-QAM QPSK QPSK 1 2 3 4 5 6 7 8 9 10 11 Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. 
