Also known as 1xEV-DO (one carrier EV-DO). A high data rate (HDR) version of Code Division Multiple Access 2000 (CDMA2000). Revision 0 (Rev 0) employs 16-QPSK modulation in support of a peak data rate of 2.4 Mbps on the downlink and 153 kbps on the uplink. In a fully loaded cell, 1xEV-DO supports average aggregate throughput of 4.1 Mbps on the downlinks and 660 kbps on the uplinks. 1xEV-DO can run in any band and can coexist in any type of network. Rev A supports peak speeds of 3.1 Mbps on the downlink and 1.8 Mbps on the uplink, and average speeds of 450-800 Mbps and 300-400 Mbps, respectively. Rev B, still under development, is anticipated to yield peak downlink speeds up to 4.9 Mbps per carrier, with as many as 3 carriers linked for aggregate peak downlink speed of 14.7 Mbps. See also 16-QPSK, CDMA2000, downlink, modulation, throughput, and uplink.