5 accepted papers
We introduce a novel one-bit quantization technique tailored for uniform linear antenna arrays. Our approach leverages error-feedback quantization to dynamically shape the quantization noise in alignment with the arrival angle of the received signal. To optimize the system’s performance within a pre…
1-bit Delta-Sigma-based transmitters enable constant envelop transmissions. This paper synthesizes a stable 1-bit Delta-Sigma modulator that minimizes the mean squared quantization error at the output of a Delta-Sigma-based transmitter. The 1-bit Delta-Sigma modulator is designed by solving convex o…
Delta-Sigma modulators are often utilized to convert analog signals into digital signals. The quantization error of a Delta-Sigma modulator can be reduced by oversampling. However, oversampling increases the number of bits per time if the same number of bits are assigned to each output of the quanti…
Optimal error feedback filters for A/D converters of remote sensors in networked control systems are studied. It is shown that if the transfer function from the quantization error to the output of interest has a minimum phase, then its inverse is the optimal error feedback filter in terms of any kin…
We consider MISO wiretap channels with multiple eavesdroppers. Under the deterministic channel uncertainties, the beamformer and the covariance of the artificial noise are jointly designed to minimize the transmit power subject to SINR constraints. Our design problems are resolved by using a semidef…