Volume 1, Number 5 (2015)
O.A. Mukukinov, V.V. Kuvshinov
THE LOW-NOISE GENERATOR ON THE INTEGRATED HMC606LC5 AMPLIFIER WITH FREQUENCY STABILIZATION BY THE DIELECTRIC RESONATOR (pp. 3-8)
Okhapkina N.B., Kazakov L.N.
STUDY EFFECTIVELY REDUCE PAPR IN MIMO-OFDM SYSTEM WITH THE ALGORITHM SPACE-TIME CODING ALAMOUTI (pp. 9-12)
V.P. Volchkov, N.E. Poborchaya, A.M. Shloma
PARAMETRIC SPECTRAL ANALYSIS OF RANDOM SIGNALS WITH USE OF RECURRENT CIRCULANT MODELS OF THE MOVING WINDOW (pp. 13-17)
A.B. Gerasimov, D.M. Solovyev
AN EFFICIENT USE OF DAC DYNAMIC RANGE IN FREQUENCY-SELECTIVE CHANNEL SIMULATOR (pp. 18-26)
Ivanov D.V., Ivanov V.A., Ryabova N.V., Elsukov A.A., Ryabova M.I., Chernov A.A.
SYSTEM OF FREQUENCY PROVIDING OF HF COMMUNICATION CHANNELS BASED ON THE NEW DIGITAL SOUNDER ON USRP PLATFORM (pp. 27-32)
L.A. Belov, A.S. Kondrashov, K.V. Romashchenko, M.A. Nemaev
Adaptive linearization system for wideband microwave power amplifiers (pp. 33-38)
ABSTRACTS & REFERENCES
THE LOW-NOISE GENERATOR ON THE INTEGRATED HMC606LC5 AMPLIFIER WITH FREQUENCY STABILIZATION BY THE DIELECTRIC RESONATOR
O.A. Mukukinov, V.V. Kuvshinov,
Moscow Technical University of Radio and Communications, Moscow, Russia
This paper presents a low-noise generator on the integrated HMC606LC5 amplifier with frequency stabilization by the dielectric resonator. Submitted by measuring the power spectral density of the phase noise.
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2. Hittite Low Noise Amplifiers // http://www.hittite.com/content/documents/data_sheet/hmc505lc5.pdf.
STUDY EFFECTIVELY REDUCE PAPR IN MIMO-OFDM SYSTEM WITH THE ALGORITHM SPACE-TIME CODING ALAMOUTI
Work is devoted to the problem of high crest factor signals orthogonal frequency and spatial separation . The efficiency of the method of clipping , considered by the author in earlier work for the case of MIMO-OFDM 2×2 and a modification . The analysis of efficiency reduction for MIMO-OFDM systems with simple clipping and the proposed method. Effectiveness of the method and the comparison is made on two parameters: the energy loss and the degree of reduction of the crest factor . It is shown that the energy losses for these conditions are on average 1.2-1.5 dB , while reducing the crest factor of 6-7 dB.
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2. Ohapkina N.B. Efficiency of methods to reduce the peak factor of signals with orthogonal frequency division in multipath radio channels with fast fading. Bulletin of the Yaroslavl State University named after P.G. Demidov. Series Natural and technical sciences. 2013. Issue. 2, pp. 32-38.
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PARAMETRIC SPECTRAL ANALYSIS OF RANDOM SIGNALS WITH USE OF RECURRENT CIRCULANT MODELS OF THE MOVING WINDOW
Parametric spectral analysis technique of discrete random signals on a finite time interval, based on the recurrent circulant model of the second dynamic order is presented. Exact analytic expressions of spectrum density the signals in the basis of discrete-continual exponential function are produced. Simulation results confirming а good property of approximation are presented.
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5. Volchkov V.P., Shloma A.M. Recurrent sliding window filters for processing vector signals. Bulletin of the Yaroslavl State University named after P.G. Demidov, Ser. Natural and technical sciences. 2013. No. 2, pp. 18-20.
AN EFFICIENT USE OF DAC DYNAMIC RANGE IN FREQUENCY-SELECTIVE CHANNEL SIMULATOR
This report presents the solution of a problem of efficient use of dynamic range of digital signal representation in implementation of frequency-selective channel simulator. A brief description of channel model is given in the first part. In the second part the technique of simulator parameters scaling is presented.
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SYSTEM OF FREQUENCY PROVIDING OF HF COMMUNICATION CHANNELS BASED ON THE NEW DIGITAL SOUNDER ON USRP PLATFORM
Ivanov D.V., Ivanov V.A., Ryabova N.V., Elsukov A.A., Ryabova M.I., Chernov A.A.,
email@example.com, Volga State University of Technology, Yoshkar-Ola, Russia
We present work about design and studying the receiving terminal of network ionospheric chirp sounder on the USRP platform and comparisons of the current results with the data of analog chirp sounder on the ICOM transceiver. We expanded the model of an ionospheric radio channel with the aim of interpretation of results of sounding for development of high-frequency communication by representation of pulse response characteristic of the broadband channel in the form of the sum of pulse response characteristics of narrow-band adjacent channels.
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2. Ivanov D.V., Ivanov V.A., Ryabova N.V., Elsukov A.A., Ryabova M.I., Chernov A.A. USRP continuous chirp SDR ionosonde. Bulletin of the Perm State Technical University. 2013. No. 3, pp. 80-93.
3. Ivanov D.V. Optimal frequency bands of complex signals for decameter radio lines. Radio Engineering and Electronics. 2006. Vol. 51. No. 4, pp. 389-396.
ADAPTIVE LINEARIZATION SYSTEM FOR WIDEBAND MICROWAVE POWER AMPLIFIERS
L.A. Belov, A.S. Kondrashov, K.V. Romashchenko, M.A. Nemaev,
firstname.lastname@example.org, National Research University MPEI, Moscow, Russia
The purpose of the work is to analyze the adaptation system of the linearization parameters with changing amplitude characteristics of the power amplifier.
1. Belov L.A., Kondrashov A.S., Rozhkov V.M., Romashchenko K.V. Improving the linearity and energy efficiency of power amplifiers for broadband microwave signals. Telecommunications. No. 5. 2012, pp. 23-25.
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