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      <rdf:Description dc:date="2020-06-16 03:01:52 " dc:source="Camtasia,19.0.10,enu" dc:title="C05_Wireless_LANs-2" tscDM:firstFrame="C05_Wireless_LANs-2_First_Frame.png" tscDM:originId="58121BEA-CBDB-4479-8064-7EB227577357" tscDM:project="C05_Wireless_LANs-2">
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                           <rdf:li><rdf:Description xmpDM:name="802.11" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="- Physical layer (historical – not in standard any longer) 3 versions: 2 radio (typ." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="2.4" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="GHz), 1 IR data rates 1 or 2 Mbit/s FHSS (Frequency Hopping Spread Spectrum) - obsolete spreading, despreading, signal strength," xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="typ." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="1 Mbit/s min." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="2.5" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="frequency hops/s (USA), two-level GFSK modulation DSSS (Direct Sequence Spread Spectrum) – many products DBPSK modulation for 1 Mbit/s (Differential" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Binary Phase Shift Keying), DQPSK for 2 Mbit/s (Differential Quadrature PSK) preamble and header of a frame is always transmitted" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="with 1 Mbit/s, rest of transmission 1 or 2 Mbit/s chipping sequence: +1, -1, +1, +1, -1, +1, +1, +1," xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="-1, -1, -1 (Barker code) max." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="radiated power 1 W (USA), 100 mW (EU), min." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="1mW Infrared - obsolete 850-950 nm, diffuse light, typ." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="10 m range carrier detection, energy detection, synchronization Prof." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="0" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IEEE 802.11" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HR/DSSS – PHY frame formats (was 802.11b)" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="High Rate Direct Sequence Spread Spectrum @ 2.4GHz" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Data rate 1, 2, 5.5," xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="11 Mbit/s, depending on SNR User data rate max." xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="approx." xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="6 Mbit/s Prof." xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications synchronization SFD signal service HEC payload PLCP preamble PLCP header 128 16 8 8 16 variable bits length" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="16 192 µs at 1 Mbit/s DBPSK 1, 2, 5.5" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="or 11 Mbit/s short synch." xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="SFD signal service HEC payload PLCP preamble (1 Mbit/s, DBPSK) PLCP header (2 Mbit/s, DQPSK) 56 16 8 8 16" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="variable bits length 16 96 µs 2, 5.5" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="or 11 Mbit/s Long PLCP PPDU format Short PLCP PPDU format (optional)" xmpDM:startTime="136067" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Channel selection (non-overlapping) Prof." xmpDM:startTime="327433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="327433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="327433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="327433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications 2400 [MHz] 2412 2483.5" xmpDM:startTime="327433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="2442 2472 channel 1 channel 7 channel 13 Europe (ETSI) US (FCC)/Canada (IC) 2400 [MHz] 2412 2483.5" xmpDM:startTime="327433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="2437 2462 channel 1 channel 6 channel 11 22 MHz 22 MHz" xmpDM:startTime="327433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IEEE 802.11" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="OFDM – PHY frame format (was 802.11a)" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Orthogonal Frequency Division Multiplexing @ 5GHz Data rates E.g." xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="6, 9, 12, 18, 24, 36, 48, 54 Mbit/s, depending on SNR and channel width User throughput (1500 byte packets):" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="5.3" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="(6), 18 (24), 24 (36), 32 (54) 6, 12, 24 Mbit/s mandatory Transmission range 100m outdoor, 10m indoor E.g.," xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="54 Mbit/s up to 5 m, 48 up to 12 m, 36 up to 25 m, 24 up to 30m," xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="18 up to 40 m, 12 up to 60 m Frequency Free 5.15-5.25," xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="5.25-5.35," xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="5.725-5.825" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="GHz ISM-band Prof." xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications rate service payload variable bits 6 Mbit/s PLCP preamble signal data symbols 12 1 variable reserved length tail" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="parity tail pad 6 16 6 1 12 1 4 variable 6, 9, 12, 18, 24, 36, 48, 54 Mbit/s" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="PLCP header" xmpDM:startTime="568667" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Operating channels of 802.11a" xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="in Europe (examples) Prof." xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications 5150 [MHz] 5180 5350 5200 36 44 16.6" xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MHz center frequency = 5000 + 5*channel number [MHz] channel 40 48 52 56 60 64 5220 5240 5260 5280" xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="5300 5320 5470 [MHz] 5500 5725 5520 100 108 16.6" xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MHz channel 104 112 116 120 124 128 5540 5560 5580 5600 5620 5640 132 136 140 5660 5680 5700" xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="805567" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Operating channels for 802.11a" xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="/ US U-NII (examples) Prof." xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications 5150 [MHz] 5180 5350 5200 36 44 16.6" xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MHz center frequency = 5000 + 5*channel number [MHz] channel 40 48 52 56 60 64 149 153 157 161" xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="5220 5240 5260 5280 5300 5320 5725 [MHz] 5745 5825 5765 16.6" xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="MHz channel 5785 5805" xmpDM:startTime="883933" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="OFDM in IEEE 802.11" xmpDM:startTime="909433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="OFDM with 52 used subcarriers (64 in total) 48 data + 4 pilot (plus 12 virtual subcarriers) 312.5" xmpDM:startTime="909433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="kHz spacing Prof." xmpDM:startTime="909433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="909433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="909433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="909433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications subcarrier number 1 7 21 26 -26 -21 -7 -1 channel center frequency 312.5" xmpDM:startTime="909433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="kHz pilot" xmpDM:startTime="909433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IEEE 802.11" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="ERP – PHY frame formats (was 802.11g)" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Extended Rate PHY @ 2.4GHz" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Data rates Builds on classical 1, 2 Mbit/s (DSSS) and 1, 2, 5.5," xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="11 Mbit/s (HR DSSS) Uses additionally OFDM for 6, 9, 12, 18, 24, 36, 48, and 54 Mbit/s (thus check" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="802.11" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="OFDM for frame formats) Many more options and modulation modes standardized but obsolete or deprecated." xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Basically, it applies the old 802.11a" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="@ 2.4" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="GHz." xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Prof." xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="965400" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IEEE 802.11" xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HT – PHY frame formats (was 802.11n)" xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="– marketed as WiFi 4 High Throughput (HT) Orthogonal Frequency Division Multiplexing (OFDM) system @ 2.4" xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="and 5 GHz Based on the OFDM system, but now using up to 4 spatial stream operating in 20 MHz" xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="bandwidth (additionally, 40 MHz bandwidth specified offering up to 600 Mbit/s) Prof." xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="1033433" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IEEE 802.11" xmpDM:startTime="1112033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="HT – PHY frame formats (was 802.11n)" xmpDM:startTime="1112033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Prof." xmpDM:startTime="1112033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1112033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1112033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1112033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications" xmpDM:startTime="1112033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Very High Throughput (VHT) PHY – uses OFDM (was 802.11ac)" xmpDM:startTime="1228000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Prof." xmpDM:startTime="1228000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Dr.-Ing." xmpDM:startTime="1228000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Jochen H." xmpDM:startTime="1228000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Schiller www.jochenschiller.de" xmpDM:startTime="1228000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Mobile Communications Source: IEEE Std 802.11-2016" xmpDM:startTime="1228000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="" xmpDM:startTime="1228000" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="IEEE 802.11" xmpDM:startTime="1415033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="VHT – High-speed for WLANs at 5 GHz – marketed as WiFi 5 Single link throughput &gt; 500Mbit/s, multi-station &gt;" xmpDM:startTime="1415033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="1 Gbit/s Bandwidth up to 160 MHz (80 MHz mandatory), up to 8x MIMO, up to 256 QAM, beamforming, SDMA" xmpDM:startTime="1415033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="via MIMO Example home configuration: 8-antenna access point, 160 MHz bandwidth, 6.77" xmpDM:startTime="1415033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Gbit/s 4-antenna digital TV, 3.39" xmpDM:startTime="1415033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Gbit/s 2-antenna tablet, 1.69" xmpDM:startTime="1415033" xmpDM:duration="1000"/></rdf:li><rdf:li><rdf:Description xmpDM:name="Gbit/s Two 1-antenna smartphones, 867 Mbit/s each Redefinition of many protocol fields and procedures! 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