Título:
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Performance of blind equalization with higher order statistics in indoor radio environments
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Autor/a:
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Valenzuela González, José Luis; Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José
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Otros autores:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. GRCM - Grup de Recerca en Comunicacions Mòbils |
Abstract:
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This paper analyzes the performance of blind equalization using the complex cepstrum of third-order moments
applied to 4-QAM time division multiple access (TDMA) indoor
radio communication systems. In particular, we have modeled
a dispersive indoor channel with Rice statistics. We used the
blind algorithms to estimate the channel-impulse response, and
from this, we computed the equalizer coefficients using a classical
minimum mean square error (MMSE) algorithm. In order to
evaluate the system performance, we calculated the bit error
rate (BER) of a decision feedback equalizer (DFE) that uses a
tricepstrum algorithm to estimate the channel-impulse response.
The results are compared with those obtained using a least sum
of square errors (LSSE) algorithm as a channel estimator and
considering the exact channel response. The results obtained show
that this kind of blind equalizer performs better than the more
classically trained equalizer when Rice channels with a strong
direct path and signal-to-noise ratios (SNR’s) lower than 20 dB
are taken into account. However, some problems relating to the
length of time needed for convergence must be solved. |
Abstract:
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Peer Reviewed |
Materia(s):
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Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Comunicacions mòbils Mobile communication systems Bit error rate Blind algorithms Blind equalization Channel-impulse response estimation Complex cepstrum Data communication Decision feedback equalisers Dispersive indoor channel Equalizer coefficients Error statistics Higher order statistics Indoor radio communication systems Indoor radio environments Land mobile radio Least mean squares methods Least sum of square errors Minimum mean square error Quadrature amplitude modulation Rice statistics Rician channels System performance Third-order moments Time division multiple access Tricepstrum algorithm 4-QAM time division multiple access BER DFE LSSE MMSE SNR's TDMA Channel estimator Multipath channel Multiple acces Sistemes de comunicacions mòbils |
Derechos:
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Tipo de documento:
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Artículo |
Editor:
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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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