模式英文

2022年12月11日发(作者：中科大研究生招生网)1. TM1， 单天线端口传输：主要应用于单天线传输的场合。

2. TM2，发送分集模式：适合于小区边缘信道情况比较复杂，干扰较大的情况，有时候也用于高速的情况，分集能够提供分集增益.

3. TM3，开环空间分集：合适于终端（ue）高速移动的情况。

4. TM4，闭环空间分集：适合于信道条件较好的场合，用于提供高的数据率传输。

5. TM5，MU-MIMO传输模式：主要用来提高小区的容量。

6. TM6，Rank1的传输：主要适合于小区边缘的情况。

7. TM7，Port5的单流Beamforming模式：主要也是小区边缘，能够有效对抗干扰。

8. TM8，双流Beamforming模式：可以用于小区边缘也可以应用于其他场景。

9. TM9, 传输模式9是LTE-A中新增加的一种模式，可以支持最大到8层的传输，主要为了提升数据传输速率





TE Transmission Mode:

Transmission mode 1: Single-antenna transmission.

Transmission mode 2: Transmit diversity, SFBC(Space-Frequency Block Coding)bad.

Transmission mode 3: Open-loop codebook-bad precoding in the ca of more than one layer, degraded to transmit diversity in the ca of rank-one transmission. (SU-MIMO)

Transmission mode 4: Clod-loop codebook-bad precoding. (SU-MIMO).

Transmission mode 5: Multi-ur MIMO version of transmission mode 4 (up to max 2 urs/layers).

Transmission mode 6: Special ca of clod-loop codebook-bad precoding limited to single layer transmission, also called beam-forming for single ur.

Transmission mode 7: Relea-8 non-codebook-bad precoding supporting only single-layer transmission per UE, it is also called beam-forming here for single layer per UE.

Transmission mode 8: Relea-9 non-codebook-bad precoding supporting up to two layers per UE.

Transmission mode 9: Relea-10 non-codebook-bad precoding supporting up to eight layers per UE.

Codebook bad mode means the precoding matrix can only be lected from known(predefined) cookbook.

Non-codebook bad mode requests different demodulation/UE specific reference signals to be inrted in the allocated RBs of PDSCH before precoding and the precoding matrix is completely lected by randomly. This mode supports up to 8 transmission layers(ranks) per UE in Relea10.

Clod-loop precoding is assumed that the network lects the precoder matrix bad on feedback(CSI-PMI/RI) from the terminal.

Open-loop precoding does not rely on any detailed precoder recommendation being reported by the terminal and does not require any explicit network signaling of the actual precoder ud for the downlink transmission. Instead, the precoder matrix is lected in a predefined and deterministic way known to the terminal in advance. One u of open-loop precoding is in high-mobility scenarios where accurate feedback is difficult to achieve due to the l******cy in the PMI reporting.