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Title:
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Performance of blind equalization with higher order statistics in indoor radio environments
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Author:
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Valenzuela González, José Luis; Valdominos Bardají, Antonio; Casadevall Palacio, Fernando José
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Other authors:
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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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Subject(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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Rights:
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Document type:
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Article |
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Published by:
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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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