PPT-Fast Compression of the OFDM Channel State Information

Avishek Mukherjee and Zhenghao Zhang Department of Computer Science Florida State University CSI is simply a complex vector containing the channel coefficients for each subcarrier in an OFDM system. Shyamnath Gollakota. Dina Katabi. What is Physical Layer Security?. Introduced by Shannon. Sender. Receiver. Channel. Time. Variations known only to sender and receiver . Why is it interesting?. No computational hardness assumptions. Division Multiplexing CO-OFDM. 1. Principle of orthogonal frequency-division multiplexing (OFDM). The principles of orthogonal frequency division multiplexing (OFDM) modulation have been in existence for several decades. However, in recent years these techniques have quickly moved out of textbooks and research laboratories and into practice in modern communications systems. The techniques are employed in data delivery systems over the phone line, digital radio and television, and wireless networking systems. 1 1.1 and Receive 1.1.1 OFDM Downstream Transmit Fidelity Requirements 1.1.1.1 OFDM Channel Power and Bandwidth For the purposes of this specification, the number of occupied CEA channels of an OFD Downclocking. . OFDM in . WiFi. Feng. Lu. , Patrick Ling, Geoffrey M. . Voelker. , and Alex C. . Snoeren. UC San Diego . Researchers report active . WiFi. radio can consume up to 70% of a smartphone’s energy . sparse . bayesian. learning. Jing Lin, . Marcel . Nassar. and Brian . L. . Evans. Department of Electrical and Computer Engineering. The University of Texas at Austin. Impulsive Noise at Wireless Receivers. Jungmin. Park. Project b. ackground. OFDM used widely for high-speed digital communication. High performance of FFT processor for real time application. Dedicated . FFT processor for only . Nulling. : . Enabling Partial Spectrum Sharing . in Wireless LANs. The University of Michigan. Kang G. Shin. kgshin@eecs.umich.edu. Xinyu. . Zhang. xyzhang@eecs.umich.edu. Current . WiFi. channelization. Jinseok. Choi and Brian L. Evans. Wireless Networking & Communication Group. The University of Texas as . Austin. Collaboration with Robert . W. Heath, Jr. , . and . Jeonghun. Park. 1. 2. Traditional Radio Access Network. WiMax. According to the applications, we define three “Area Networks”:. . Personal Area Network (PAN),. for communications within a few meters. This is the typical Bluetooth or . Zigbee. application between . Division . Multiplexing ). Basics of . ofdm. Orthogonal Frequency Division Multiplexing.  (OFDM) is a method that allows to transmit high data rates over extremely hostile channels at a comparable low complexity.  . (Session 3). 1. Outline. LTE TDD frame structure. Downlink reference sequences. Uplink transmission . 2. Allocatable. resources. LTE – radio resource = “time-frequency chunk” MCS. 3. Time domain. for MIMO system . and . MIMO-OFDM Channel Estimation . Prepared by: . Duaa. . Waleed. . Rawya. . Deriah. . Walaa. . Hammoudeh. Supervisor: Dr. . Yousef. . Dama. . 1. Outline. Ron Hranac. Technical Leader. Cisco Systems. Bruce . Currivan. Technical Director. Broadcom. DOCSIS Background. DOCSIS 1.0. gave us standards-based interoperability, which means “certified” . cable modems. Gennady Pekhimenko. § . Vivek Seshadri. §. Onur Mutlu. . §. . Michael A. Kozuch. †. Phillip B. Gibbons. † . Todd C. Mowry. . §. § . Carnegie Mellon University . † . Intel Labs Pittsburgh.