| 摘要 |
A resource block can include all symbols in a slot for each, generally a multiple of 12, sub-carrier in the resource block. A slot is typically 0.5 m illiseconds (ms) and includes 7 symbols for short cyclic prefix (CP) and 6 s ymbols for long CP. The resource block can include a SRS channel as well as other channels such as an acknowledgement (ACK) channel and a channel qualit y indication (CQI) channel. Although defined as a separate physical channel, the SRS can be multiplex with uplink channels. In accordance therewith, an SRS can be detected in a slot of a 1.0 ms sub-frame constituting two slots, typically one slot but not the other including the SRS. The structure of the slot can be modified to facilitate the multiplexing by, e.g., replacing an existing symbol with the SRS, and a length and a type of a time domain ortho gonal spreading code can be determined for each slot as a function of SRS pr esence.
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