Ashraf Ali Kassim

Publications of Ashraf Ali Kassim

• An efficient stochastic framework for 3D human motion tracking

  Authors: Bingbing Ni, Stefan Winkler, Ashraf Ali Kassim

  Proc. SPIE Three-Dimensional Image Capture and Applications, San Jose, CA; 01/2008

• Articulated object registration using simulated physical force/moment for 3D human motion tracking

  Authors: Bingbing Ni, Stefan Winkler, Ashraf Ali Kassim

  Proc. 2nd Workshop on Human Motion (in conjunction with ICCV), Rio de Janeiro; 10/2007

• 3D surveillance system using multiple cameras

  Authors: Ajay K. Mishra, Bingbing Ni, Stefan Winkler, Ashraf Ali Kassim

  Proc. SPIE Videometrics, San Jose, CA; 01/2007

• On the SER analysis of A-law companded OFDM system

  Authors: Xianbin Wang, Tjeng Thiang Tjhung, Chun Sum Ng, Ashraf Ali Kassim

  Global Telecommunications Conference, 2000. GLOBECOM '00. IEEE; 02/2000

  Orthogonal frequency division multiplexing (OFDM) has established itself as a very appealing technique for high-rate data transmission over dispersive channels. The main disadvantage of OFDM is thatOrthogonal frequency division multiplexing (OFDM) has established itself as a very appealing technique for high-rate data transmission over dispersive channels. The main disadvantage of OFDM is that the signal exhibits Gaussian-like time-domain waveform with high peak-to-average power ratio, which limits the efficiency of the transmitter amplifier and degrades the received signal to noise ratio. The companding technique can be employed to mitigate quantization noise and the peak-to-average-power ratio of OFDM system. The symbol error rate of the companded OFDM systems is investigated. The performances of the systems with and without companding are compared