Electrical - Electronic Engineering / Elektrik - Elektronik Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/11

Browse

Filters

2006 - 200912010 - 20161

Settings

Subject: search.filters.subject.Orthogonal frequency division multiplexingWoS Q: search.filters.wosQuartile.Q4

Search Results

Now showing 1 - 2 of 2
  • Article
    Citation - WoS: 2
    Citation - Scopus: 2
    Iterative Channel Estimation for Higher Order Modulated Stbc-Ofdm Systems With Reduced Complexity
    (Korean Society of Internet Information, 2016) Baştürk, İlhan; Özbek, Berna
    In this paper, a frequency domain Expectation-Maximization (EM)-based channel estimation algorithm for Space Time Block Coded-Orthogonal Frequency Division Multiplexing (STBC-OFDM) systems is investigated to support higher data rate applications in wireless communications. The computational complexity of the frequency domain EM-based channel estimation is increased when higher order constellations are used because of the ascending size of the search set space. Thus, a search set reduction algorithm is proposed to decrease the complexity without sacrificing the system performance. The performance results of the proposed algorithm is obtained in terms of Bit Error Rate (BER) and Mean Square Error (MSE) for 16QAM and 64QAM modulation schemes.
  • Article
    Citation - WoS: 2
    Citation - Scopus: 3
    Low Complexity Zf Receiver for Orthogonal Sfbc-Ofdm in Broadband Wireless Channels
    (Institution of Engineering and Technology, 2006) Özbek, Berna; Le Ruyet, Didier
    Orthogonal space-frequency block coded (SFBC) orthogonal frequency division multiplexing (OFDM) systems are analysed in broadband wireless channels where adjacent subcarriers do not have the same channel coefficients and the matched filter receiver causes an error floor in bit error rate performance. To avoid this, a low complexity zero forcing (ZF) receiver for the orthogonal schemes with two and three transmit and one receive antennas are proposed.