CONTENT 5-2017

A.A. Mitrofanov, A.R. Safin, N.N. Udalov
PHASE NOISES OF A SPIN-TRANSFER NANO-OSCILLATOR WHEN SYNCHRONIZING A PHASE AUTOMATIC FREQUENCY SYSTEM AND AN EXTERNAL HARMONIC SIGNAL (pp. 3-8)

S.V. Petushkov, L.A. Belov
DIGITAL LINEARIZATION SYSTEM OF TRANSISTOR MICROWAVE POWER AMPLIFIER BY PREDICTION BY EVEN HARMONICS (pp. 9-13)

N.E. Poborchaya, E.R. Khasyanova
COMPENSATION OF SIGNAL DISTURBANCES IN A CHANNEL WITH SLOW RELAY RELAYS (pp. 14-17)

I.V. Ryabov, I.V. Strelnikov, S.V. Tolmachev
DIGITAL FREQUENCY SYNTHESIS FOR MULTI-FREQUENCY TELEGRAPHY (pp. 18-22)

N.I. Smirnov, V.A. Sivov, V.I. Filatov
DEVELOPMENT OF A METHOD FOR SELECTING A COMPLEX SIGNAL AND ITS PROCESSING DEVICES FOR SATELLITE ASYNCHRONOUS INFORMATION TRANSMISSION SYSTEMS (pp. 23-27)

V.E. Turov, L.N. Kazakov, D.Yu. Vishnyakov, D.S. Pogrebnoy
RESEARCH OF THE INFLUENCE OF PHASE NOISE OF NODES OF A SIGNAL FORMING DEVICE ON THE COHERENT ACCUMULATION EFFICIENCY OF A SHORT RADIO PULSES (pp. 28-33)

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ABSTRACTS & REFERENCES

PHASE NOISES OF A SPIN-TRANSFER NANO-OSCILLATOR WHEN SYNCHRONIZING A PHASE AUTOMATIC FREQUENCY SYSTEM AND AN EXTERNAL HARMONIC SIGNAL

A.A. Mitrofanov,
mitrofanov_alexander@mail.ru,
National Research University “MPEI”; LLC “Radiocomp”,
A.R. Safin, N.N. Udalov,
National Research University of MPEI, Moscow, Russia

Abstract

The current trend in electronics is to reduce the size of key elements and devices. High demands are placed on the basic characteristics of these devices. Therefore, many scientific groups are studying the so-called spin-transfer nano-oscillators, which allow microwave oscillations to be obtained in a wide frequency range and have sizes on the order of tens and hundreds of nanometers. The unsolved problem is the low output power of a single oscillator and the low frequency stability of the output oscillations. One method to improve noise performance is to use synchronization systems. For any generator, one of the main characteristics is the phase noise level. The first measurements showed a high value of phase noise, which does not meet the requirements of telecommunication and transmitting devices. One way to reduce them is to use a phase locked loop. One of the applications of phase self-tuning of the frequency of spin-transfer nano-oscillators is the creation of devices for measuring phase noise. Previously, the authors investigated the dynamics of such systems. A comparison of the amplitude and phase noise of an autonomous and synchronized phase-locked loop with the external harmonic effect of spin-transfer nanoscillators is presented.

References

1. Rippard W.H., Pufall M.R., Kaka S., Silva T.J., and Russek S.E. Current-driven microwave dynamics in magnetic point contacts as a function of applied field angle. Phys. Rev. B. Vol. 70. P. 100406. 2004.
2. Stefano Bonetti, Pranaba Muduli, Fred Mancoff, and Johan Åkerman. Spin torque oscillator frequency versus magnetic field angle: The prospect of operation beyond 65 GHz. Appl. Phys. Lett. 2009. Vol. 94, p. 102507.
3. Slavin A., Tiberkevich V. Nonlinear auto-oscillator theory of microwave generation by spinpolarized current. IEEE Trans. On Magn. Vol. 45, No. 4, April 2009, pp. 1875-1918.
4. Mishagin K.G., Shalfeev V.D. Synchronization of a spin nanogenerator using a phase locked loop. Letters in ZhTF. 2010. Vol. 36. Issue 22, pp. 51-57.
5. Villard P., Ebels U., Houssameddine D., Katine J., Mauri D., Delaet B., Vincent P., Cyrille M., Viala B., Michel J., Prouvée J., Badets F. A GHz Spintronic-Based RF Oscillator. IEEE journal of solid-state circuits. Vol. 45. No. 1, 2010, pp. 214-223.
6. Mitrofanov A.A., Safin A.R., Udalov N.N. Phase synchronization system of a spin-transfer nanoscillator. Letters in ZhTF. 2014. Vol. 40. Issue 13, pp. 66-72.
7. Mitrofanov A.A., Safin A.R., Udalov N.N. Amplitude and phase noise of a spin-transfer nano-oscillator synchronized by a phase locked loop. Letters to ZhTF 2015. Vol. 41. Issue 16, pp. 29-35.
8. Kim J.-V., Tiberkevich V., Slavin A. Stochastic theory of spin-transfer oscillator linewidths. Phys. Rev. Lett. 2008. Vol. 100, p. 017207.
9. Zhalud V. and Kuleshov V.N. Noises in semiconductor devices. Moscow: Sov. Radio. 1977. 338 p.

DIGITAL LINEARIZATION SYSTEM OF TRANSISTOR MICROWAVE POWER AMPLIFIER BY PREDICTION BY EVEN HARMONICS

S.V. Petushkov, sp-rks@ya.ru,
L.A. Belov, belovla@gmail.com,
National Research University “Moscow Energy Institute”;
JSC “Russian Space Systems”, Moscow, Russia

Abstract

In transistor power amplifiers (TPA) of a complex signal, when operating in non-linear mode near the saturation region of the active element, a contradiction arises between the energy efficiency in the working frequency band and the permissible level of out-of-band intermodulation emissions in neighboring frequency bands, which violates the requirements of electromagnetic compatibility. In the microwave range, the contradiction is aggravated, in addition to the effects of AM / AM compression, by the influence of variations in the input amplitude on changes in the phase shift (AM / FM conversion). The main technical solution to resolve this contradiction is to reduce the TPA output power level to -10 dB compared to the nominal value for the harmonic input signal, with this mode of operation, the efficiency is reduced by 40%. Therefore, the most effective technical solution to this contradiction today is the use of pre-distorting linearization systems TPA. TPA analog prediction linearization systems are difficult to configure, have a limited band of transmitted frequencies and do not allow adaptive correction when environmental factors affecting the characteristics of TPA are changed. Known linearization options based on the use of even harmonics of the information message are implemented as part of a digital modulating signal generating unit in the base frequency band, provide an increase in TPA energy efficiency and a simultaneous decrease in the level of interfering third-order radiation from them. However, near saturation, the interfering components of not only the 3rd, but also the 5th and other odd orders have a comparable level, therefore, eliminating only the 3rd order components does not completely remove the linearization of the TPA characteristics. The purpose of the study of the presented FNG system is to consider the possibility of simultaneously minimizing the total power of interfering components of the 3rd and 5th orders in the TPA operation mode near the saturation region with increasing energy efficiency of the cascade taking into account the phenomena of AM / AM and AM / FM transformations.

References

1. Sich F., Bujatti M. Powerful solid-state microwave amplifiers. Moscow: Technosphere, 2016. 416 p.
2. Kim Y., Jeon K-K., Kim E-K., Kim B-C. An analog Lineariser Based on Amplitude Modulation with Even Harmonic Signals. Microwave Journal. Vol. 52. No. 2, February 2009, pp. 80-88.
3. Shaper of radio signals with digital predistortion even harmonics Patent RU 2 538 306 C1, IPC: H 04 B 7/005 (2006.01), author Kondrashov AS; patent holder of JSC Russian Space Systems; declared 11/11/2013; publ. 01/10/2015, bull. No. 1.
4. Belov L.A., Kondrashov A.S., Petushkov S.V. Correlation assessment of the level of intermodulation distortion of microwave signals in power amplifiers. Elektrosvyaz. 2015. No. 5, pp. 36-41.
5. Martirosov V.E. Theory and technique of receiving discrete signals TsSPI. Moscow: Radio engineering. 2005. 144 p.

COMPENSATION OF SIGNAL DISTURBANCES IN A CHANNEL WITH SLOW RELAY RELAYS

N.E. Poborchaya, n.poborchaya@mail.ru,
E.R. Khasyanova, ehasyanova@gmail.com,
Moscow Technical University of Communications and Informatics, Moscow, Russia

Abstract

An algorithm for compensating signal distortions in a channel with Doppler spreading and Rayleigh fading is considered. The quadrature components of the channel are estimated using polynomial approximation inside the temporary sliding window and the least squares method. Formulation of the problem. To compensate for signal distortions, such as amplitude-phase imbalance, constant component drift, and its further quasicoherent reception, it is necessary to know the communication channel. Often in algorithms for estimating unknown parameters of a signal, it is assumed that its amplitude is constant or changes very slightly. This is true for fixed or slow moving subscribers. Otherwise, the assumption that the amplitude of the signal is constant becomes unfair, the complex channel multiplier varies with time. Under these conditions, the sample size of the signal, at which its amplitude can be considered constant, is reduced, which leads to a decrease in the accuracy of estimating the signal parameters and an increase in the probability of error. The communication channel is modeled using the Jakes model, which takes into account the Doppler spread of the signal spectrum, subject to Rayleigh fading.

References

1. Makarov E.V., Pestryakov A.V. Study of nodes of the receiving path of mobile terminals of cellular communication systems Telecommunication. 2010. No3, pp. 27-31.
2. Kosichkina TP, Khasyanova E.R. Analysis of the influence of the characteristics of quadrature converters on the operation of radio receivers of digital signals of radio communication and broadcasting. T-Comm. 2013. No. 9, pp. 100-103.
3. Pestryakov A.V., Khasyanova E.R. Analysis of compensation methods for imperfect operation of quadrature converters of digital radio communication radio receivers. Elektrosvyaz. 2013. No.5, pp. 20-29.
4. Chakra S.A., Huyart B. Auto calibration with training sequences for wireless local loop at 26 GHz. IEEE Microwave and Wireless Components Letters. August 2004. Vol. 14. No. 8, pp. 392-394.
5. Tubbax J. et al. Compensation of IQ Imbalance and Phase Noise in OFDM Systems. IEEE Trans. Wireless Commun. May 2005. Vol. 4. No. 3, pp. 872-877.
6. Valkama M., Renfors M. A novel image rejection architecture for quadrature radio receivers. IEEE Transactions on Circuits and Systems II: Express Briefs. February 2004. Vol. 51. No. 2, pp. 61-68.
7. Valkama M., Renfors M., Koivunen V. Blind signal estimation in conjugate signal models with application to I/Q imbalance compensation. IEEE Signal Processing Lett. November 2005. Vol. 12, pp. 733-736.
8. Poborchaya N.E. Analysis of the operation of the KAM signal distortion compensator observed against the background of additive noise. Telecommunication. 2014. No.5, pp.20-25.
9. Poborchaya N.E. Methods for the joint assessment of the drift of the constant components and the amplitude-phase imbalance of the KAM signal against the background of additive white noise. Telecommunication. 2013. No.5, pp. 24-26.
10. Pestryakov A.V., Poborchaya N.E., Khasyanova E.R. Simplified distortion compensation algorithms for the KAM signal observed against additive noise. Telecommunication. 2016. No.4, pp. 35-40.
11. Kreindelin V.B. New signal processing methods in wireless communication systems. St. Petersburg: Link Publishing House. 2009.
12. Kalashnikov K.S. Algorithms for estimating channel parameters with orthogonal frequency division of signals based on Kalman adaptive filter. The dissertation for the degree of candidate of technical sciences. 01/13/01. System analysis, management and information processing (in technical systems). MSTU named after Bauman, 2014.
13. Poborchaya N.E., Pestryakov A.V., Khasyanova E.R. Synthesis and analysis of the compensation algorithm to the QAM signal distortion due to non idealities of quadrature downconversion at awgn and phase noise in the presence of quazideterministic bandpass interference. T-Comm. 2015. Vol. 9. No. 3, pp. 82-85.
14. Poborchaya N.E. Analysis of KAM-64 signal distortion compensation algorithms observed against additive white noise and MSI. Synchronization, signal generation and processing systems. 2015. Vol. 6. No. 4, pp. 173-175.
15. Volchkov V.P., Poborchaya N.E., Shloma A.M. Parametric spectral analysis of random signals using recurrent circulant sliding window models. Synchronization, signal generation and processing systems. 2014. Vol. 4. No. 4, pp. 115-118.
16. Poborchaya N.E., Smerdova E.O. A variational algorithm for compensating distortions of the QAM signal against the background of quasi-determined bandpass noise and additive white noise. Synchronization, signal generation and processing systems. 2014. Vol. 4. No. 4, pp. 141-147.

DIGITAL FREQUENCY SYNTHESIS FOR MULTI-FREQUENCY TELEGRAPHY

I.V. Ryabov, I.V. Strelnikov, S.V. Tolmachev,
ryabov22@mail.ru,
Volga State Technological University, Yoshkar-Ola, Russia

Abstract

A new structure of a digital frequency synthesizer is considered, which has increased speed and allows the formation of a complex frequency-modulated signal that can be used in modern communication systems.

References

1. Ryabov I.V. Direct digital synthesis of complex broadband signals for radar, navigation and communications. Yoshkar-Ola: PSTU, 2016. 151 p.
2. Ryabov I.V., Dedov A.N., Tolmachev S.V., Chernov D.A., Mishakov A.A. Patent No. 2566961 of the Russian Federation. IPC H03B 19/00. Digital frequency synthesizer for multi-frequency telegraphy. Claim 04/14/2014. Publ. 10/27/2015. Bull. No. 30.6 p.

DEVELOPMENT OF A METHOD FOR SELECTING A COMPLEX SIGNAL AND ITS PROCESSING DEVICES FOR SATELLITE ASYNCHRONOUS INFORMATION TRANSMISSION SYSTEMS

N.I. Smirnov, MTUCI,
V.A. Sivov, VA Strategic Missile Forces named after Peter the Great,
V.I. Filatov, vfil10@mail.ru,
MSTU N.E.Bauman, Moscow, Russia

Abstract

The problem of multicriteria choice of the type of signal-code construction for asynchronous information transmission systems is investigated. When taking into account the requirements for this asynchronous information transfer system. It justifies the consideration of the main quality indicators of asynchronous information transmission systems, which must be taken into account when choosing the type of complex noise-like signal and structural schemes for their optimal processing.

References

1. Smirnov N.I., Georgadze S.F. The duration of the time of entering the synchronism of a receiver of a noise-like complex signal in a satellite asynchronous information transmission system. Foreign Radio Electronics: Achievements of Modern Radio Electronics. 1997. No. 5, pp. 41-51.
2. Smirnov N.I. Properties and characteristics of noise-like signals. In the book “Noise-like Signals in Information Transmission Systems”. Moscow: Sov. Radio. 1973. Ch. 3, pp. 101-144.
3. Tuzov G.I., Sivov V.A., Prytkov V.I. etc. Interference immunity of radio systems with complex signals. Moscow: Radio and communications. 1985. 264 p.
4. Gig D. Van. Applied General Theory of Systems. Moscow: Mir. 1981.
5. Smirnov N.I., Georgadze S.F. Comparison of the characteristics of the spectra of various types of noise-like signals. Radio Engineering. 1990. No. 6, pp. 6-12.
6. Smirnov N.I., Sizov I.V., Petrov A.R. The formation of multifrequency quasicoherent phase-manipulated complex signals using SAW devices. Radio Engineering. 1990. No. 11, pp. 10-14.
7. Smirnov N.I., Georgadze S.F. Noise immunity of asynchronous transmission systems with noise-like signals under the action of narrow-band interference. Radio Engineering. 1993. No. 7, pp. 27-36.
8. Gutkin L.S. Optimization of electronic devices. Moscow: Sov. radio, 1975. 368 p.
9. Makarov I.M., Vinogradskaya T.M., Rubchinsky A.A., Sokolov V.B. Theory of choice and decision making. Moscow: Nauka. 1982. 328 p.

RESEARCH OF THE INFLUENCE OF PHASE NOISE OF NODES OF A SIGNAL FORMING DEVICE ON THE COHERENT ACCUMULATION EFFICIENCY OF A SHORT RADIO PULSES

V.E. Turov, victorturiov@gmail.com,
L.N. Kazakov, kazakov@uniyar.ac.ru,
D.Yu. Vishnyakov, vishnyakovdenisu@yandex.ru,
D.S. Pogrebnoy, dmitry.pogrebnoy@gmail.com,
Yaroslavl State University P.G. Demidov, Yaroslavl, Russia

Abstract

The efficiency of coherent accumulation of a packet of short radio pulses was studied depending on the parameters of the PSD phase noise of the signal at the ADC input. Losses with respect to ideal coherent accumulation (accumulation according to the N law) in the interval of 15,000 radio pulses (6 ms) do not exceed 0.02 dB; therefore, accumulation should be considered effective. A linear dependence is observed on the length of the coherent packet, which allows us to assert effective accumulation at times up to tenths of a second with losses up to 0.04 dB.

References

1. Fedorov I. B., Slukin G. P., Akhiyarov V.V. Investigation of the spectral characteristics of a signal scattered by the sea and diffraction attenuation along the propagation path in the meter range of radio waves. Foreign Radio Electronics. Advances in Modern Electronics. 1999. No. 5, pp. 28-34.
2. Leonov A.I., Leonov S.A., Nagulinko F.V. et al. Radar tests (performance assessment). Moscow: Radio and communications. 1990. 208 p.