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In this paper, a fast blind carrier frequency estimation algorithm is used for estimating the modulated signal frequency and it requires no priori knowledge of the signal. The carrier frequency estimation is transformed to the phase estimation of an autocorrelation of the received signal. The algorithm is so simple that it can work speedy. Simulations show that the fast algorithm can work well for...
MIMO radar with orthogonal signal transmission is equivalent to form virtual sensors at the receiver. The virtual sensors can be used to form narrower beams with lower sidelobes. The pattern of MIMO radar can be decomposed into transmit pattern and receive pattern by mathematical analysis. In this paper, we apply conventional beamforming and MVDR beamforming algorithms to MIMO radar. At last, the...
A novel adaptive digital predistortion method combines RLS (Recursive Least-Square) and LMS (Least Mean-Square) with Volterra kernel is proposed to compensate the nonlinear and memorial distortion of OFDM power amplifier. For RLS could induce unexpected modulation mistakes in small error signal, it is chosen to estimate coefficients in big error signals to ensure the high convergent speed. As soon...
A novel adaptive digital pre-distortion algorithm with Volterra kernel is provided. According to the error threshold, corresponding convergent process is selected to compensate coefficients of OFDM power amplifier. When the error signal is big, adaptive algorithm with high speed convergence will be picked up. Otherwise,the pre-distorter coefficients updating base on a smooth convergent process which...
We combined the finite rate of innovation (FRI) method with singular value decomposition (SVD) theory and got an improved sampling algorithm of non-band limited signals. It used SVD instead of annihilating filter in FRI method to reduce noise. We took streams of diracs signal as an example and deduced the detailed sampling and reconstruction process in the improved algorithm. It first found DFT coefficients...
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