LTE 空中接口技术与性能
物理层概述
> Maximum channel rate
> 14 OFDM symbols per 1ms
> 100 RB * 12 sc = 1200 IQ
symbols
> 20MHz: 14*1200 = 16.8Msps
> SISO 64QAM(6 bit/per symbol):
16.8*6 = 100.8Mbps
> 2*2 MIMO 64QAM: 2*100.8 =
201.6Mbps
> 4*4 MIMO 64QAM: 4*100.8 =
403.2Mbps
> Overhead: control information,
common singling, coding and
header overhead, guard, etc so
the maximum payload rate to a
single user is considerably
lower
> Simulations in 3 km/h and siteto-
site distance 500 m indicates
173 Mbps (2x2 MIMO) and 326
Mbps (4x4 MIMO) in the
downlink
