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FDD LTE Frequency Bands Resultant increase by amplitude of the signal What is diffraction? In addition to Free Space Loss, the Link Budget used in this proposal includes an estimated Rain Loss Factor (RLF) based on results based on the ITU recommendation. 0000023358 00000 n The required flexibility and resulting requirements to support LTE operation in different paired and unpaired frequency arrangements are further discussed in Chapter 22. Comparison of time division duplex (TDD) and frequency division duplex (FDD) attributes. LTE EARFCN to frequency calculator Webuplink frequency. Click to email a link to a friend (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). 0000025138 00000 n A description of the basic time- and frequency-domain structure of LTE is provided in the chapter. The number of OFDM/SC-FDMA symbols within one subframe is either 14 for a normal cyclic prefix or 12 for an extended cyclic prefix (Figure 10.10). Base stations are required to be synchronized with respect to the uplink and downlink transmission times. Using a TDD system, it is possible to change the capacity in either direction simply by changing the number of time slots allocated to each direction. The LTE physical-layer specifications allow for a carrier to consist of any number of resource blocks in the frequency domain, ranging from a minimum of six resource blocks up to a maximum of 110 resource blocks. The chapter concludes with introducing different duplex schemes, such as frequency-division duplex (FD), time-division duplex (TDD), and LTE and TD-SCDMA coexistence. Microwave Link Antenna G/T 0000015012 00000 n The frequency of the signal during uplink and downlink is known as uplink frequency and downlink frequency respectively. The minimum scheduling unit, consisting of two time-consecutive resource blocks within one subframe (one resource block per slot), can be referred to as a resource-block pair. Downlink In our previous content on satellite uplink, we have discussed how the signal from the earth station is transmitted to the satellite.