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The problem of MIMO communications with imperfect channel knowledge at the receiver is considered. Imperfect channel knowledge results from errors due to noise and errors due to time variations which cause the channel estimates to become outdated. A receiver structure named the Unified Generalized Likelihood Ratio Detector (UGLRD) is presented. The UGLRD is based on joint symbol-channel estimation,...
We consider turbo-coded MIMO systems with Rayleigh fading, when channel state information is available at the receiver only. Using our recently proposed linearly complex MIMO signal detector, we derive two bit-error-rate bounds on performance for such systems by extending the union bound method from turbo codes on the AWGN channel to time-varying MIMO fading channels. These bounds allow a designer...
In this paper we introduce an improved version of the turbo layered orthogonal lattice detector (T-LORD), recently presented. This implementation, namely K-Best T-LORD, misses the performance of the turbo MAP detector by only few tenths of dB in various configurations, like the fully enhanced T-LORD. However, its complexity is quadratic in the number of transmitting antennas instead of exponential...
A joint channel estimation and data detection scheme by using Markov chain Monte Carlo (MCMC) is proposed for MIMO-OFDM systems with multi-tone narrow-band interference (MTNBI). The channel impulse response, the noise variance and the indicator of the impulse noise can be estimated accurately, and then the receiver knows whether the signal is interfered by the narrow band interference. One of the...
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