Section: 5.5.3.2.2 Mapping to physical resources for additional SRS
Content: An additional SRS spans one or more SC-FDMA symbols in the time domain, where - the starting SC-FDMA symbol within the subframe is given by the higher-layer parameter srs-StartPosAdd; - the duration in number of SC-FDMA symbols, including potential guard symbols, is given by the higher-layer parameter srs-DurationAdd. Mapping to physical resources shall be done according to clause 5.5.3.2.1 with the following exceptions: - frequency hopping between SC-FDMA symbols is supported and if a UE is configured by higher layer parameter srs-GuardSymbolFH-Add, a guard symbol is added between every frequency hop; - antenna switching within a subframe is supported and if a UE is configured by higher layer parameter srs-GuardSymbolAS-Add, a guard symbol is added between every antenna switching; - where is the additional SRS transmission number not counting guard symbol(s) within the subframe with corresponding to the starting SC-FDMA symbol , and is the repetition factor given by the higher-layer parameter srs-RepNumAdd; - is given by the higher-layer parameter srs-BandwidthAdd; - is given by the higher-layer parameter srs-HoppingBandwidthAdd; - is the number of frequency hops with the same antenna/antenna pair for additional SRS, derived from if antenna switching is not configured for additional SRS, and from if antenna switching is configured for additional SRS, where is the repetition factor given by the higher-layer parameter srs-RepNumAdd, is the number of antenna switches for additional SRS defined in 8.2 of [4], is the guard-symbol configuration for antenna switching given by the higher-layer parameter srs-GuardSymbolAS, is the guard symbol configuration for frequency hopping given by the higher-layer parameter srs-GuardSymbolFH, and is given by the higher-layer parameter srs-DurationAdd; - is given by the higher-layer parameter srs-FreqDomainPosAdd; - is given by the higher-layer parameter srs-AntennaPortAdd; - is given by the higher-layer parameter srs-CyclicShiftAdd; - is given by the higher-layer parameter srs-TransmissionCombNumAdd; - is given by the higher-layer parameter srs-TransmissionCombAdd.