LTE, or Long Term Evolution, is a a 4th generation (4G) mobile broadband standard and is aimed to be the successor to the 3G technologies GSM/UMTS. It is currently in development and is considered the competitor to WiMax. Carriers will include Verizon, T-Mobile, Vodafone, AT&T, and many more worldwide.
This technology will provide broadband services wirelessly [...]

LTE supports voice and efficient support of voice was one of the key considerations in designing LTE. The voice solution for LTE is IMS VoIP and it is fully specified. The 3GPP solution for voice over LTE is a combination of multiple efforts:

The work in Rel 7 to optimize IMS signalling and VoIP encoding [...]