Phase 3 is the Long Term Evolution (LTE).

第三阶段是长期演进阶段；

It has been concluded in 3rd Generation Partnership Project (3GPP) that the codebook-based precoding is necessary in the long term evolution (LTE) downlink.

第三代通讯系统国际标准组织已建议在未来通讯标准之远程发展下链传输中采用码簿方式的预前编码。