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Applied Cryptography

Applied Cryptography

Applied Cryptography. Spring 2014. GSM and cryptography. Frequency planning. A cluster is a group of cells which uses the entire radio spectrum. The cluster size N is the number of cells in each cluster. Each cell within a cluster is allocated a distinct set of frequencies

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1.09k views • 86 slides
Helsinki University of Technology Department of Electrical and Communication Engineering

Helsinki University of Technology Department of Electrical and Communication Engineering

Helsinki University of Technology Department of Electrical and Communication Engineering. WCDMA Simulator with Smart Antennas Hong Zhang Communication laboratory Supervisor: Professor Seppo J. Halme Instructor: M. Sc. Adrian Boukalov. Helsinki University of Technology

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440 views • 22 slides
Wideband Communications

Wideband Communications

Wideband Communications . Lecture 14-17: CDMA Aliazam Abbasfar. Outline. Multi-access channel. Messages share a common channel A user = A message source/destination Multi-point to point communications (Uplink/Reverse channel)

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309 views • 16 slides
Wideband Communications

Wideband Communications

Wideband Communications . Lecture 20-23: MC-CDMA Aliazam Abbasfar. Outline. IS-95/ WCDMA MC-DS-CDMA MC-CDMA OFDMA. IS-95. DSSS 1.2288 Mchips /sec ( BW = 1.25 MHz) FDD Downlink Synchronous CDMA Quadrature spreading 2 Extended M-seq. (2 15 -chip long)

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320 views • 15 slides
SATELLITE DATA LINK SYSTEM (SDLS)

SATELLITE DATA LINK SYSTEM (SDLS)

SATELLITE DATA LINK SYSTEM (SDLS). A DEDICATED MOBILE SATELLITE COMMUNICATION SYSTEM RESPONDING TO THE HIGHLY DEMANDING REQUIREMENTS OF CIVIL AVIATION Claude Loisy European Space Agency (ESA). Satellite Data Link System. The Air/Ground Communications of Civil Aviation.

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380 views • 12 slides

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