LTE上行为什么要采用SC-FDMA技术？

看高通给的原因主要是上行要求低功耗，低复杂度，以及降峰均比，而SC-FDMA可以满足这样的需求：

Why SC-FDMA in uplink􀂄
1)High PAPR in OFDM is a major issue for uplink transmission scheme􀂄
2)Uplink transmission requires low power, low complexity, low cost
3)SC-FDMA can meet these requirements􀂄
4)SC-FDMA is also known as Discrete Fourier Transform Spread OFDM (DFTS-OFDM)

OFDMA会带来高PAPR，会影响终端的射频成本和电池寿命，终端的待机会大大缩短。而采用SC-FDMA可以满足低峰均比。

主要从用户终端能耗去考虑