Master of Science in Information Technology at N.O.R.T.H.W.E.S.T.E.R.N University
"Explore major topics in wireless systems, standards, cellular concepts, modulation, diversity, propagation, and multiple access methods in the Master of Science in Information Technology program at N.O.R.T.H.W.E.S.T.E.R.N University."
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Presentation Transcript
N O R T H W E S T E R N MSIT | Master of Science in Information Technology U N I V E R S I T Y Quiz Review Major topics: Overview of wireless systems / standards Cellular concepts (frequency reuse, interference, user capacity) Propagation Modulation Diversity Multiple access (FDMA, TDMA, CDMA, OFDMA)
N O R T H W E S T E R N MSIT | Master of Science in Information Technology U N I V E R S I T Y Wireless Systems/Standards Cellular 2G (GSM), 3G (CDMA2000, UMTS/W-CDMA,1xEVDO), 4G (LTE) WLANs 802.11a/b/g/n PAN Bluetooth
N O R T H W E S T E R N MSIT | Master of Science in Information Technology U N I V E R S I T Y Cellular Concepts Frequency reuse / cell cluster size FDD, TDD S/I or SINR Blocking probability, trunking efficiency Effect of sectorization Performance measure?
N O R T H W E S T E R N MSIT | Master of Science in Information Technology U N I V E R S I T Y Propagation Distance attenuation (path loss) Compute transmit power given dB loss Shadowing Multipath Rayleigh fading Doppler shift (vf/c) Narrowband vs wideband signals Coherence band, frequency diversity Delay spread
N O R T H W E S T E R N MSIT | Master of Science in Information Technology U N I V E R S I T Y Modulation FSK, ASK, PSK, QPSK, QAM Power vs bandwidth efficiency Shannon formula Signal constellation Nyquist symbol rate, intersymbol interference, excess bandwidth OFDM
N O R T H W E S T E R N MSIT | Master of Science in Information Technology U N I V E R S I T Y Diversity Forms: macro, frequency, space, time, path, user Time diversity: error control coding Selection diversity (HW problem 2) MIMO
N O R T H W E S T E R N MSIT | Master of Science in Information Technology U N I V E R S I T Y Multiple Access FDMA, TDMA, CDMA Correlation receiver Direct-Sequence Spread spectrum Processing gain Interference vs bandwidth tradeoff Frequency hopping OFDMA
