Essays about: "AWGN"

Showing result 21 - 25 of 37 essays containing the word AWGN.

  1. 21. Performance Analysis of Cyclostationary Sensing in Cognitive Radio Networks

    University essay from Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE)

    Author : Asif Mirza; Faique Bin Arshad; [2011]
    Keywords : Cyclostationary Sensing in Cognitive Radio; BPSK QPSK Signal detection;

    Abstract : Cognitive radio is one of the modern techniques for wireless communication systems to utilize the unused spread spectrum effectively. This novel paradigm makes wireless communication possible with less interference. In our work we have investigated one of the functions of cogni- tive radio called spectrum sensing. READ MORE

  3. 22. OFDM Systems Offset Estimation and Cancellation Using UKF and EKF

    University essay from Institutionen för datavetenskap, fysik och matematik, DFM

    Author : Dinsefa Mustefa; Ermias Mebreku; [2011]
    Keywords : Orthogonal Frequency Devision Multiplexing; Inter carrier interference; Unscented Kalman filter; Extended Kalman filter; Frequency offset; Estimation; Compensation; OFDM; UKF; EKF; ICI; ISI;

    Abstract : Orthogonal Frequency Division Multiplexing (OFDM) is an efficient multi- carrier modulation scheme, which has been adopted for several wireless stan- dards. Systems employing this scheme at the physical layer are sensitive to frequency offsets and that causes Inter Carrier Interference (ICI) and degra- dation in overall system performance of OFDM systems. READ MORE

  4. 23. The Performance Evaluation of OFDM Based WLAN (IEEE 802.11a and 802.11g)

    University essay from Blekinge Tekniska Högskola/Sektionen för datavetenskap och kommunikation

    Author : Kamil Mohiuddin Shaikh; [2010]
    Keywords : OFDM; IEEE 802.11a and IEEE 802.11g;

    Abstract : ABSTRACT In the past decade there has been a steady growth in development and implementation of wireless Local Area Networks and emerged as in the largest sectors of the telecommunication industry. Wireless local area network (WLANs) provides connectivity, mobility, and much higher performance and achievable data rate. READ MORE

  5. 24. Construction and Performance Evaluation of QC-LDPC Codes over Finite Fields

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Sohail Noor; Ihsan Ullah; [2010]
    Keywords : Low Density Parity Check LDPC codes; Finite Fields;

    Abstract : Low Density Parity Check (LDPC) codes are one of the block coding techniques that can approach the Shannon’s limit within a fraction of a decibel for high block lengths. In many digital communication systems these codes have strong competitors of turbo codes for error control. READ MORE

  6. 25. Performance Analysis of Selected Cooperative Relaying Techniques

    University essay from Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Author : Muhammad Afaq; Sahibzada Muhammad Faheem; [2010]
    Keywords : Cooperative communication; Relaying techniques; Amplify-and-forward; Decode-and-forward; DtF; S-DtF; MRC;

    Abstract : Recently, cooperative communication has gained significant interest due to the fact that it exploits spatial diversity and provides capacity/performance gain over conventional single- input single-output (SISO) systems. A mobile node with single antenna can cooperate with a nearby mobile node having single antenna in multi-user environment to create the effect of virtual multiple antenna system. READ MORE