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9/14/2014 ShareTechnote http://www.sharetechnote.com/html/FrameStructure DL.html#Whole_Frame Snapshot 1/15 Frame Structure - Downlink Home : www.sharetechnote.com  One good way to study this kind of thing and get some practical understanding would be to start from the view f rom the highest level and get deeper into it step by step. Overview-FDD Overview-TDD PBCH(Physical Broadcast Channel) The first L(1 or 2 or 3) Symbols PCFICH(Physical Control Format Indicator Channel) PDCCH(Physical Downlink Control Channel) PHICH PDSCH(Physical Downlink Shared Channel) PRACH P-SS(Primary Synchronization Signal) Reference Signal RS (Reference Signal) - Cell Specific (Antenna port 0,1,2,3) RS (Reference Signal ) - MBSFN (Antenna Port 4) RS (Reference Signal ) - UE Specific (Antenna Port 5,7,8,9,10) RS (Reference Signal ) - Positioning (Antenna Port 6) RS (Reference Signal ) - CSI (Antenna Port 15,16,17,18,1 9,20,21,22) Whole Frame Snapshot Physical Channels in Communication Gallery  Overview - FDD  The highest level view from 36.211 for FDD LTE is as follows. It only shows the structure of one f rame in time domain. It does not show any structure in frequency domain. Some of high level description you can get from this figure would b e i) Time duration for one frame (One radio fra me, One system frame) is 10 ms. This means that we have 100 radio frame per second. ii) the number of samples i n one frame (10 ms) is 307200 (307.200 K) samples. This means that the number of samples per second is 307200 x 100 = 30.72 M samples. iii) Number of subframe in one frame is 10. iv) Number of slots in one subframe is 2. This means that we have 20 slots within one frame.  So one slot is the smallest structure in time domain ? No, if you magnify this frame structure one step further, you would get the following figure. Now you see that one slot is made up of 7 small blocks cal led 'symbol'. (One symbol is a certain time span of signal that carry one spot in the I/Q constellation.). And you see even smaller structures with in a symbol. At the beginning of symbol you see a very small span ca lled 'Cyclic Prefix' and the remaining part is the real symbol data. There are two different type of Cyclic Prefix. One is normal Cyclic Prefix and the other is 'Extended Cyclic Prefix' which is Wireless Communication Rf analog.com/Wideband-RF-PDF What exactly is SFDR? How Can it Improve High Perf. Systems? Get PDF

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http://www.googleadservices.com/pagead/aclk?sa=L&ai=CxwFZef0VVLHZC--xlAKV34GABNyjypwFrIvEutEBwI23ARABIMDgtxdQk631kgJgyZ7ljOSkwBOgAcyB-_4DyAEBqAMByAPDBKoElwFP0I3rApaL3GvxoxkFbMlpUieZdCEFPtHudmETBa0J5sRFyDgoot4vVCZU6kQb5Tg1vG87DspVuXwUZwiUpAWW7ECsGaoQT5z6ENuh_Y1AX4otYlh7vaPbwlphlkon3GpaAbgvn3hBncpXgUVOh47caO1n57DVLKupFg0I6yGW_7DE4o3huEFhf_f9DWt3MfskxDmhpCV4iAYBgAec_oQB&num=1&cid=5GgEVJwYwn2kLYbZZJnN6oVx&sig=AOD64_1klWtRlm-2uOpwncFWX9E3qNSGQQ&client=ca-pub-9961293861045757&adurl=http://h.analog.com/WidebandRF-WP
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