“Digital
Signal Processing” No. 42012
In
the issue:

detection of tonal components;
 correlation of spectral coefficients;

coherent accumulation with decimation;
 synchronous detection;
 instantaneous frequency estimation;
 peak factor of OFDM signals;
 signal to noise ratio estimation;
 neural signal processing.


O.V. Ponomareva, A.V. Ponomarev, N.V. Ponomareva
Sliding Parametric DFT in the Tasks of Tonal Component Detection
The paper considers a generalization of the algorithm for a singlebin
sliding DFT (SDFT) as a sliding parametric singlebin DFT (SDFTP) which
unlike standard SDFT enables to estimate the spectrum not at fixed frequencies
but of a set of frequencies the number of which varies by Q parameter:
{2(k+0)/N} where k= 0,N/21, 0 < Q < 1, N is a number of signal samples.
Email: ponva@mail.ru
Y.S. Radchenko, S.V. Milyaev
On Correlation for Spectral Coefficients of Generalized Fourie Series
in Continuous Space
A correlation for
spectral coefficient of generalized Fourie series in continuous space
within one block and between neighbor image blocks is estimated. Functional
relations of standardized coefficients of intra and interblock correlation
of spectral coefficients to a correlation distance value are analyzed.
General estimated relations are specified for the case of signal decomposition
on Hermite function and Legendre polynomial bases.
Email: ysradchenko@yandex.ru
B.A. Alpatov, P.V. Babayan, S.A. Smirnov, A.B. Feldman
Measuring Object Positions in Multispectral Image Sequence
A number of developed by the authors algorithms for measuring object positions
in multispectral image sequences are considered in this paper. The experiments
carried out with the use of nature video subjects show that a combined
use of TV and IR band data enables to increase the efficiency of object
tracking. To prevent problems arising due to a nonuniform background
image and foreign moving objects available it is proposed to take into
consideration the above mentioned directly at the stage of measuring object
positions.
Email: aitu@rsreu.ru
D.S. Grigoryan
Methods of Signal Data Decimation with Coherent Accumulation in Digital
Spectral Analysis with Superresolution
Phase and amplitude autoregression methods of linear prediction for spectral
analysis with data decimation due to preliminary signal processing in
bandwidth filters tuned to the energy center of signal frequencies are
validated. Due to preliminary signal filtering prior to spectral estimation
procedures, coherent accumulation of their energy is achieved. Compared
to familiar autoregression methods of spectral analysis this increases
the efficiency of superresolution for sources with similar frequencies
within a defraction resolution element.
Email: dangrigoryan@yandex.ru
A.Yu. Glukhov, I.V. Neginsky
Applying Synchronous Detection Method for Polyharmonic Signal Spectrum
Estimation
Digital synchronous
detection method to estimate absolute amplitudes and phases of strongly
nonlinear substances with an arbitrary number of harmonic components is
proposed. The possibility of applying this method to be used in realtime
systems based on digital signal processors or microcontrollers is considered.
The results of experimental verification of the method for a meander
type signal as well as the results of a numerical simulation on test mono
and polyharmonic signals with additive Gaussian noise are given.
Email: GaufRF@gmail.com
R.A. Korotchenko
Method of
Seismoacoustic Pulse Selection and Estimation in Computer Processing
Method and sequence of processing algorithms for computeraided search,
selection and estimation of seismoacoustic pulse parameters with a various
degree of detailing a wave structure pattern are distributed. Pulse recognition
and selection procedures are a success in a wide range of signaltonoise
ratio due to the use of pulse model as lowfrequency modulation of background
oscillations. Examples for processing realtime signals of seismoacoustic
monitoring are presented.
Email: romankor@mail.ru
A.G. Zuev, V.A. Uvarov, V.M. Golovkov
Widening the Cumulative Code Class
Methods of information encoding and decoding using pairs of singlechannel
cumulative cods (A and B) with zero side lobe signals of autocorrelation
function (ACF) in even clock periods by a “flightsignal” common to all
subscribers are considered. The paper presents the codes of no regular
structure with even 6 to 30 digit (capacity) with multiple doubling the
latter in a general recurrent formula. The advantage of cumulative codes
in question is a wider choice of code length depending on specific conditions
of using the code as one improving the validity of information received
as well as doubling the efficiency of encoding.
Email: Vikset@yandex.ru
M.A. Dubov, A.L. Priorov
NonDataAided Estimation Method of SignaltoNoise Ratio and Bit Error
Rate for QAM Signals
The paper presents a comparative analysis of methods for measuring signal
noisiness seldom described in Russian technical literature. Relatively
simple methods for “blind” estimation of signaltonoise ratio (SNR) for
signals with quadrature modulation types (e.g. QAM) are proposed. Modified
methods for a precise estimation of bit (symbol) error rate (BER, SER)
using some frames and with no need of any standard sequences in a signal.
Calculationbase results are also given.
Email: andcat@yandex.ru
E.N. Potekhin,
A.N. Leukhin
Methods of Constructing Biphase and FourPhase Unimodular Periodic Sequences
with Irrational Phases
Method of constructing biphaseunimodular sequences based on periodic optimal
binary sequences with a twolevel autocorrelation function is proposed.
Sidelobe level to sequencelength relation is shown. Method of constructing
fourphase sequences with an ideal periodic autocorrelation function (PACF)
based on quaternary optimal sequences is also proposed.
Email: potegor@yandex.ru
Yu.S. Shinakov
Peak Factor of OFDM Signals and Nonlinear Distortion in Radio Equipment
of Wireless Access Systems
Using PC simulation
and analytic methods this paper shows that nonlinear distortion analysis
for power amplifiers of base and mobile stations for access systems with
OFDM technology can be carried out by distortion analysis of both test
signal envelope and instantaneous signal values. Power amplifier parameters
being investigated are undisturbed signal power and signaltointerference
ratio at amplifier output.
Email: shinarov1@mtuci.ru
A.N. Varnavsky
Heart Ventricle “Surge” Detection
Heart ventricle “surge” detection method based on analyzing electrocardiosignal
by using nonlinear integral transformations is described. RST segment
depression and negative Twave selection independent of QRS complex is
proposed to be used.
Email: varnavsky_alex@rambler.ru
V.A. Romanchuk, V.N. Ruchkin, V.A. Fulin
Modelling Complex Neuroprocessor System
Problems of modeling NM640x family neuroprocessorbeing developed by scientific
and engineering center “Module” as well as problems of modeling complex
neuroprocessorbased computing systems are considered. Graphical presentations
for models of scalar and vector neuroprocessor unit as highly parallel
system are proposed. A model of neuroprocessorbased computing system
as a state machine is also proposed. Analytical expressions of modeling
results are shown. Case study results are presented.
Email: virom11@yandex.ru
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