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The low complexity, robust, and precise algorithm solely employs a simplified autocorrelation function of the signal spectrum for blind chromatic dispersion estimation to adapt frequency domain compensation functions in digital coherent receivers.
Error-rate evaluation of space-time codes using union bounds sometimes requires very heavy computational loads and so is impractical to use. In this paper, a common function shared by different union bounds is derived and used to develop a modified union bound (MUB) for error-rate evaluation. Results of numerical evaluations and Monte-Carlo simulation on two 2times2 rotation-based S-T codes show that...
We combine a virtual-source based synthetic aperture focusing technique with coherence weighting to overcome the limited depth-of-focus of high numerical aperture THz optics. Images show depth-independent spatial resolution and a 14 dB improvement in SNR.
The formula for the exact union bound (EUB) on BER based on the exact closed-form pair-wise error probability (PEP) is most accurate for calculating the bit-error-rates (BERs) of space-time (S-T) codes in multiple-input multiple output (MIMO) systems. In this paper, it is shown that using the exact closed-form PEP formula for numerical calculations of the PEP or the EUB on BER could produce negative...
A close-form expression of the exact pair-wise error probability (PEP) for space-time (S-T) codes in Rayleigh fading channel is derived using the probability-density function (PDF) of a sum of independent exponential distributed random variables. Since the expression requires evaluating the coefficients for partial fraction expansion, an easy analytical way is proposed for doing this. The exact PEP...
Union bound based on Pair-wise Error Probability (PEP) has been widely used for error-rate performance evaluation of Space-Time (S-T) codes. At low signal-to-noise ratios (SNRs), the PEP is not very accurate, leading to a loose Union bound. A numerical integration method using correct probability is proposed in this paper for the evaluation of block-error rate (BLER) of S-T codes. Numerical results...
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