M. Manaffar

Publications (2)0 Total impact

• Conference Proceeding: An efficient timing and frequency synchronization algorithm for OFDMA/TDD mode in downlink of IEEE 802.16-2004

  M. Naderi, H. Bakhshi, S. Akhlaghi, M. Manaffar
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  ABSTRACT: Timing and frequency synchronization is the important task in receiver. In this paper, an efficient timing and carrier frequency offset (CFO) estimation algorithm for orthogonal frequency division multiple access/ time division duplexing (OFDMA/TDD) mode in IEEE 802.16-2004 standard (WiMAX) is represented. This method has high performance and jointly estimates timing error and CFO. The performance is evaluated in multipath fading channel. This algorithm can be easily used for other OFDM based systems which receiver knows preamble by itself.
  Advanced Communication Technology (ICACT), 2010 The 12th International Conference on; 03/2010
• Conference Proceeding: A New Dynamic Pricing Scheme with Call Admission Control to Reduce Network Congestion

  M. Manaffar, H. Bakhshi, M. Pilevari
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  ABSTRACT: Due to the importance of congestion in networks, we look for a method that can reduce the network congestion, in recent years considerable efforts have focus on the call admission control that provide the desired QoS but cannot reduce the network congestion, so in this paper we introduce a new scheme that add an additional dimension (dynamic pricing) to CAC in order to reduce congestion. Dynamic pricing encourages users to use resources efficiency. In this scheme price depends on the network load so it can reduce congestion. We compare the performance of our scheme in term of congestion prevention with conventional systems where no pricing block is implemented. These results show improvement that can be achieved by the integration of pricing in the call admission control process in networks.
  Advanced Information Networking and Applications - Workshops, 2008. AINAW 2008. 22nd International Conference on; 04/2008