Results 141 to 150 of about 2,075,015 (178)

Cognitive interference channels with state information

2008 IEEE International Symposium on Information Theory, 2008
Cognitive state-dependent interference channels are analyzed. We focus on the two-user case with two message sources. One of the transmitters, referred to as the cognitive informed user, knows both messages and also the states of the channel in a non-causal manner.
Anelia Somekh-Baruch, Shlomo Shamai, Sergio Verdu   +2 more
openaire   +1 more source

Estimation of Radar Channel State Information

2019 IEEE Radar Conference (RadarConf), 2019
In this paper, we will study the estimation of channel state information of a radar system whose clutter returns can be modeled using a channel matrix with entries computed from fundamental physics using a stochastic Green's function based approach. We develop a simple algorithm for channel estimation using well-known frequency domain techniques.
Sandeep Gogineni, Muralidhar Rangaswamy, Joseph R. Guerci, Jamie S. Bergin, David R. Kirk   +4 more
openaire   +1 more source

WiFi Sensing with Channel State Information

ACM Computing Surveys, 2019
With the high demand for wireless data traffic, WiFi networks have experienced very rapid growth, because they provide high throughput and are easy to deploy. Recently, Channel State Information (CSI) measured by WiFi networks is widely used for different sensing purposes.
Yongsen Ma, Gang Zhou, Shuangquan Wang
openaire   +1 more source

Information freshness over a Markov channel: The effect of channel state information

Ad Hoc Networks, 2019
Abstract We consider a communication problem in which a source desires to maintain the freshness of the information updates it sends to a destination, over a channel that varies according to a Markov chain. Freshness is quantified in terms of the age metric (unlike the familiar delay metric), which refers to the difference between the current time ...
Gam D. Nguyen, Sastry Kompella, Clement Kam, Jeffrey E. Wieselthier   +3 more
openaire   +1 more source

Multi-channel Access Algorithm with Channel State Information Unknown

2012 Fifth International Conference on Intelligent Computation Technology and Automation, 2012
The partially observed Markov decision process (POMDP) is very important in cognitive radio network. We can formulate the opportunistic spectrum access in the framework of POMDP. However, no attention was paid to the algorithm in the presence of unknown environment.
Gao Yang, Wang Yiming
openaire   +1 more source

Cooperative relay-broadcast channels with causal Channel State Information

2009 IEEE International Symposium on Information Theory, 2009
In this paper, we consider partially and fully cooperative state-dependent relay broadcast channels with perfect causal Channel State Information (CSI). For these two channels, we study three different situations: 1) both the source and the relay nodes have access to perfect CSI, 2) perfect CSI is only known to the relay nodes, 3) perfect CSI is only ...
Reza Khosravi-Farsani, Bahareh Akhbari, Mahtab Mirmohseni, Mohammad Reza Aref   +3 more
openaire   +1 more source

Optimal wireless multiuser channels with imperfect channel state information

2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012
This paper considers algorithms for optimal transmission over wireless multiuser channels where the transmitter has access to imperfect channel state information (CSI). We focus on downlink orthogonal frequency division multiple access and multiuser uplink random access.
Yichuan Hu, Alejandro Ribeiro
openaire   +1 more source

Channel state information based key generation vs. side-channel analysis key information leakage

2011 5th International Conference on Network and System Security, 2011
Numerous research efforts have been made recently on exploiting the randomness of wireless channels to generate secret keys. This channel state information (CSI) based key generation method relies on spatial independence between the legitimate and eavesdropping channels.
null Huiyun Li, null Qi Zhang, null Hai Yuan   +2 more
openaire   +1 more source

Zero-error capacity for finite state channels with feedback and channel state information

2008 IEEE International Symposium on Information Theory, 2008
In this paper, we study the zero-error capacity for finite state channel with feedback when channel state information is known to both the transmitter and the receiver. We prove that the zero-error capacity in this case can be obtained through the solution of a dynamic programming problem. Exact answers are also given for certain cases.
null Lei Zhao, Haim Permuter
openaire   +1 more source

Channel reliability metrics for flat Rayleigh fading channels without channel state information

SympoTIC '04. Joint 1st Workshop on Mobile Future & Symposium on Trends In Communications (IEEE Cat. No.04EX877), 2005
In this work, iterative decoding of block turbo codes (BTCs) over flat Rayleigh fading channels is considered. The signal is modulated using binary phase shift keying (BPSK) and coherently detected. An exact channel reliability metric that should be passed to the iterative decoder to achieve optimum performance, when no channel state information (CSI ...
A. Shaheem, M. Caldera, H.-R. Zepernick
openaire   +1 more source