equency offset (MHz) Interference CW signal level (dBc) Inter-modulation product (dBc) RECEIVER CHARACTERISTICS We specify receiver characteristics at the UE antenna connector, and for UE(s) with an integral antenna only, we assume a reference antenna with a gain of 0 dBi. Receiver characteristics for UE(s) with multiple antennas/antenna connectors are FFS. 5.4.1 Diversity We assume appropriate receiver structure using coherent reception in both channel im- pulse response estimation and code tracking procedures. The UTRA/FDD includes three types of diversity: time diversity channel coding and interleaving in both up- and downlink; multi-path diversity rake receiver or other appropriate receiver structure with maximum combining; antenna diversity occurs with maximum ratio combining in the BS and option- ally in the MS. 5.4.2 Reference and Maximum Sensitivity Levels Reference sensitivity implies the minimum receiver input power measured at the an- tenna port at which the Bit Error Ratio (BER) does not exceed a specific value, e.g. The UTRA Transmission System BER = 0.001, the DPCH_Ec has a level of -117 dBm/3.48 MHz, and the for a level of -106.7 dBm/3.84 MHz. For the maximum input level, also with BER not exceeding 0.001, for -25 dBm/3.84 MHz, and DPCH_Ec/for= =-19 dB. In the TDD mode reference sensitivity levels for EDPCH_Ec/Í, and for are 0 dB and -105 dBm/3.84 MHz, respectively, while the maximum sensitive level requirements are -7 dB and -25 dBm/3.84 MHz. 5.4.3 Adjacent Channel Selectivity (ACS) Adjacent Channel Selectivity (ACS) refers to the measure of a receiver's ability to re- ceive a W-CDMA signal at its assigned channel frequency in the presence of an adja- cent channel signal at a given frequency offset from the centre frequency of the as- signed channel. We define the ACS as the ratio of receive filter attenuation on the as- signed channel frequency to the receive filter attenuation on the adjacent channel(s) [1]. The ACS shall be better than 33 dB in Power Class 2(TDD), 3 and 4 for the test pa- ramet