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Uplink Physical Channels

An uplink physical channel contains resource elements that carry information originating from higher layers.

The following uplink physical channels are defined:

• Physical Uplink Shared Channel (PUSCH)

• Physical Uplink Control Channel (PUCCH)

• Physical Random Access Channel (PRACH)

The following general steps describe uplink signal generation on a physical uplink shared channel. Figure 1 illustrates this process.

For details, refer to the 3GPP Technical Specifications documents at http://www.3gpp.org.

1. Scramble the bits.

2. Modulate the scrambled bits to generate complex-valued symbols.

3. Apply transform precoding to generate complex-valued modulation symbols.

4. Map the complex-valued modulation symbols to resource elements.

5. Generate a complex-valued time-domain SC-FDMA signal for each antenna port.

Figure 1. Uplink Signal Generation