There is a known digital divide in the world. Central African countries and countries in Central Asia like Nepal, Tibet and inner China
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AUTHOR NAME PATNT NAME PATNT ONCE PATNT NUMBER DATE

Characterizing AND MODULING THE RADIO PROPAGATION CHANNEL

H.Zaghloul “Wireless Infrastructure: OFDM shoulders heavy RF traffic,” EE Times.   2001
Zaghloul and Fattouche "They teamed up in 1989 to work on wireless communications. They first worked on characterizing the indoor propagation channel. "     1989
Zaghloul and Fattouche "By 1991, they invented a model equalizer for fading channels that removes some of the irreducible bit error rate thus increasing the information carrying capacity of a noisy channel."     1991
Zaghloul and Fattouche "In 1992, they developed wideband OFDM that improved on conventional OFDM in three ways: it used the simple channel estimator to remove the effects of the propagation channel;it scrambled the phase of the signal before it entered into the FFT which reduced the peak to average problem of OFDM; they removed classical hardware carrier and clock recovery and replaced them with digital techniques. These opened the door for the high speed WiFi and WiMAXThe second improvement was then applied to codes in CDMA and helped in introducing the speed improvements in 3G and LTE."     1992
D.Zaghloul "Dr.Hatim Zaghloul : https://scholar.google.com/citations?user=sGpv1xkAAAAJ&hl=en "      
H.Zaghloul and M.Fattouche "Equalization of pi/4 offset DQPSK transmitted over flat fading Channels ,” Communications, 1992. ICC’92, Conference record, SUPERCOMM/ICC’92"     1992
H.Zaghloul and M.Fattouche "“A New Equalizer for Wideband OFDM over a Frequency-Selective Fading Channel,” Wireless Personal Communications " Conference Proceeding, Virginia Tech, (Springer, 1994) 1993.   1993
H.Zaghloul and M.Fattouche "Error Reduction of DMPSK Transmitted Over Flat Fading Channels,” Wireless Personal Communications" Conference Proceeding, Virginia Tech, (Springer, 1993) 1992.   1992
M.Fattouche and H.Zaghloul "Estimation of the Phase of Signals Transmitted over Fading Channels" Electronic Letters, 27 (20) 1823-4 1991

Characterizing AND MODULING THE RADIO PROPAGATION CHANNEL

D.Zaghlol (4th of 4 author) “Modified Simulation of the Urban Radio Propagation Radio Channel (SURP),” Electronics Letters 29 (21) 1825-1826. 1995
H.Zaghloul (3rd of 5 authors) "The Dependence of Indoor Radio Channel Multipath Characteristics of Transmit/Receiver Ranges,” IEEE journal on selected areas in communications 11 (7)" Electronics Letters 29 (21) 979-990.  
H.Zaghloul(1st of four authors) "Comparison of Indoor Propagation Channel Characteristics at Different Frequencies,” Electronic Letters, 27 (22)" Electronics Letters, 27 (22) 2077-9 1991
H.Zaghloul (1st of three authors) "Frequency Response and Path Loss Measurements of the Indoor Channel," Electronics Letters 27 (12) 1021-1022. 1991
H.Zaghloul (5th of five authors) "A comparison of two radio propagation channel impulse response determination techniques," IEEE transactions on antennas and propagation 41 (4) 515-517. 1991
H.Zaghloul (1st of three authors) "Frequency Response and Path Loss Measurements of the Indoor Channel," Electronics Letters 27 (12) 1021-2. 1991
H.Zaghloul (5th of five author) "An Investigation of Static Indoor Channel Multipath Characteristics" Proceedings of Wireless’91, Calgary, Alberta, Canada, July   1991
H.Zaghloul (2nd of four authors) "Frequency Response of the Indoor Channel," Proceedings of Wireless’91, Calgary, Alberta, Canada, July 1825-1826. 1991
H.Zaghloul, (2nd of 3 authors) "Statistical Analysis and Autoregressive Modeling of the Indoor Radio Propagation Channel," Universal Personal Communications, 1992. ICUPC’92 Proceedings, Dallas, Tx.   1992
H.Zaghloul, (2nd of five authors), IEEE Pacific Rim Conference "Frequency Measurements of the Indoor Channel: System Evaluation and Post Processing Using IDFT and ARMA Modeling," Victoria, British Columbia, Canada, May 10 1825-1826. 1991
H.Zaghloul (First of five authors) "Frequency Response Measurements of the Indoor Channel," ANTEM’90, Winnipeg, MB, Canada, August 15-17, 1990 pp.267-272 1990
H.Zaghloul (first of five authors) "Measurements of the Frequency Response of the Indoor Channel," 33rd Midwest Symposium on Circuits and Systems, Calgary, AB, Canada, August 12-15   1990