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Transmission Modes and Transmission Schemes

The UE procedure for receiving the physical downlink shared channel (PDSCH) is outlined in TS 36.213 [1], Section 7.1. Transmission mode combinations the UE shall use to decode PDCCH and any corresponding PDSCH, as defined in TS 36.213 [1], Table 7.1-5, are indicated here:

Transmission modes (TM)

DCI format

Transmission schemes

TM1

1A

Single antenna port, port0

1

TM2

1A

Transmit diversity

1

TM3

1A

Transmit diversity

2A

Open-loop codebook based precoding (large delay CDD) or transmit diversity

TM4

1A

Transmit diversity

2

Closed-loop codebook based precoding

TM5

1A

Transmit diversity

1D

Multiuser MIMO version of TM4

TM6

1A

Transmit diversity

1B

Closed loop codebook based precoding for single layer

TM7

1A

Single antenna port, port 0 if the number of PBCH antenna ports is one, otherwise transmit diversity

1

Non-codebook based precoding for single layer (single antenna port, port 5)

TM8

1A

Single antenna port, port 0 if the number of PBCH antenna ports is one, transmit diversity otherwise

2B

Non-codebook based precoding for up to two layers (dual layer port 7 and 8 or single antenna port, port 7 or 8)

TM9

1A

  • For non-MBSFN subframe: Single antenna port, port 0 if the number of PBCH antenna ports is one, transmit diversity otherwise

  • MBSFN subframe: single antenna port, port 7

2C

Non-codebook based precoding for up to eight layers (up to eight layer transmission ports 7–14 or single antenna port, port 7 or 8)

TM10

1A

  • For non-MBSFN subframe: Single antenna port, port 0 if the number of PBCH antenna ports is one, transmit diversity otherwise

  • MBSFN subframe: single antenna port, port 7

2D

Extension of TM9 for CoMP (up to eight layer transmission ports 7–14 or single antenna port, port 7 or 8)

References

[1] 3GPP TS 36.213. “Physical layer procedures.” 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA). URL: http://www.3gpp.org.

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