Section: 5.5.3.2.1 Mapping to physical resources for basic SRS
Content: The sequence shall be multiplied with the amplitude scaling factor in order to conform to the transmit power specified in clause 5.1.3.1 in TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], and mapped in sequence starting with to resource elements on antenna port according to where is the number of antenna ports used for sounding reference signal transmission and the relation between the index and the antenna port is given by Table 5.2.1-1. The set of antenna ports used for sounding reference signal transmission is configured independently for periodic and each configuration of aperiodic sounding. The quantity is the frequency-domain starting position of the sounding reference signal and for and is the length of the sounding reference signal sequence defined as where is given by Table 5.5.3.2-1 through Table 5.5.3.2-4 for each uplink bandwidth . The cell-specific parameter srs-BandwidthConfig, and the UE-specific parameter srs-Bandwidth, are given by higher layers. For UpPTS, shall be reconfigured to if this reconfiguration is enabled by the cell-specific parameter srsMaxUpPts given by higher layers, otherwise if the reconfiguration is disabled ,where is a SRS BW configuration and is the set of SRS BW configurations from the Tables 5.5.3.2-1 to 5.5.3.2-4 for each uplink bandwidth , is the number of format 4 PRACH in the addressed UpPTS and derived from Table 5.7.1-4. The frequency-domain starting position is defined by where for normal uplink subframes is defined by and for UpPTS by The quantity is given by where the relation between the index and the antenna port is given by Table 5.2.1-1, is given by the UE-specific parameter transmissionComb or transmissionComb-ap for periodic and each configuration of aperiodic transmission, respectively, provided by higher layers for the UE, and is frequency position index. The variable is equal to 0 for UpPTS in the first half frame and equal to 1 for UpPTS in the second half frame of a radio frame. The frequency hopping of the sounding reference signal is configured by the parameter , provided by higher-layer parameter srs-HoppingBandwidth. Frequency hopping is not supported for aperiodic transmission, except for additional SRS. If frequency hopping of the sounding reference signal is not enabled (i.e., ), the frequency position index remains constant (unless re-configured) and is defined by where the parameter is given by higher-layer parameters freqDomainPosition and freqDomainPosition-ap for periodic and each configuration of aperiodic transmission, respectively. If frequency hopping of the sounding reference signal is enabled (i.e., ), the frequency position indexes are defined by where is given by Table 5.5.3.2-1 through Table 5.5.3.2-4 for each uplink bandwidth , where regardless of the value on Table .2-1 through Table 5.5.3.2-4, and counts the number of UE-specific SRS transmissions, where is UE-specific periodicity of SRS transmission defined in clause 8.2 of TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4], is SRS subframe offset defined in Table 8.2-2 of TS 36.213[ Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures ]  [4] and is the maximum value of for a certain configuration of SRS subframe offset. The sounding reference signal shall be transmitted in the last symbol of the uplink subframe. Table 5.5.3.2-1: and , , values for the uplink bandwidth of Table 5.5.3.2-2: and , , values for the uplink bandwidth of Table 5.5.3.2-3: and , , values for the uplink bandwidth of Table 5.5.3.2-4: and, , values for the uplink bandwidth of