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We derive a phase retrieval algorithm using the alternating direction method of multipliers. For the cost function obtained from the maximum likelihood criterion, we introduce auxiliary amplitude and phase variables to avoid the absolute value operator and decouple the determination of the auxiliary phase variables from that of the auxiliary amplitude variables. As a result, a phase retrieval algorithm...
In this paper, a resonator-based non-invasive material sensor and its sensor interface circuits are presented. The sensing interface circuits detect the resonant frequency and resonator loss caused by the material under test. The readouts of resonance frequency and resonator loss correspond to the real and the imaginary parts of the sample relative permittivity respectively. The resonant amplitude...
A joint filter using lattice predictor based adaptive Volterra filter(LVF) is proposed to effectively suppress narrowband interference (NBI) in Global Positioning System (GPS) receiver. A lattice structure is employed for whitening the input signal. The performance is expressed in terms of BER and SNR improvement. Computer simulation results show that LVF can achieve excellent performance in terms...
To investigate the blind symbol rate estimation of any linear base-band digital modulation scheme with square root raised cosine filter, an algorithm based on cyclic correlation and Haar wavelet transform estimator is proposed. First we use FFT to estimate the bandwidth roughly. Then we set the sampling frequency and range scale of wavelet transform according to bandwidth. Using the signals filtered...
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