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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 |
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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. |
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Abstract:
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Peer Reviewed |
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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 |
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Derechos:
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Tipo de documento:
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Artículo |
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Editor:
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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Compartir:
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