Mohsen Jamalabdollahi

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The problem of joint carrier frequency offset (CFO) and channel estimation in orthogonal frequency division multiplexing (OFDM) systems is investigated in this study. The exact solution to this problem turns out to be too complex for practical purposes. To overcome this difficulty, we resort to the recursive least square (RLS) algorithm and propose an(More)
In this paper, we propose a new analysis for randomized 2-SAT and 3-SAT algorithms, and show that we could determine more precise boundaries for transition probability of Markov chain using Karnaugh map. In our analysis we will show the probability that the selected literal has been flipped correctly is so close to 3 2 and 7 4 , respectively for 2-SAT and(More)
This paper introduces a novel and effective time-of-arrival (ToA) based range measurement of sensor nodes deployed within Non-homogenous (NH) medium consisting of time and frequency dispersive sub-medias via orthogonal frequency division multiple access (OFDMA) subcarriers. In the proposed technique, each sensor node exploits pre-allocated orthogonal(More)
New method for equalization and symbol detection for 8-PSK EDGE system is investigated in this study. The exact solution to this problem, Maximum Likelihood Sequence Estimation (MLSE) turns out to be too complex for practical purposes, but this method introduce a new version of Delayed Decision Feedback Sequence Estimation (DDFSE) equalizer that has less(More)
This paper introduces a novel method to improve the Time of Arrival (ToA) estimation resolution for a fixed available bandwidth in the presence of unknown multipath frequency selective (MPFS) channels. Here, the maximum rising level detector (MRLD) technique is proposed which utilizes oversampling and multiple correlation paths to evaluate with high(More)
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