We propose and demonstrate a 3-D acquisition system with background suppression capability based on a structured light projection method. We have designed and demonstrated CMOS image sensor for frequency and phase detection by in-pixel digital demodulation circuit. The demodulation circuits suppress background light and extract modulated signal light that encodes angular information in frequenc...

BACKGROUND High order modulation and demodulation technology can solve the frequency requirement between the wireless energy transmission and data communication. In order to achieve reliable wireless data communication based on high order modulation technology for visual prosthesis, this work proposed a Reed-Solomon (RS) error correcting code (ECC) circuit on the basis of differential amplitude...

Continuous wave direct-conversion microwave Doppler radar can be used to detect cardiopulmonary activity at a distance. Demodulation sensitivity to a target’s distance in a single channel system can be solved by using a quadrature direct-conversion receiver. A particular challenge in this technique is accurate demodulation in the presence of unwanted dc offset. A center tracking compensation me...

This paper analyzes the effect of the carrier frequency offset on frequency-domain differential demodulation in orthogonal frequency division multiplexing (OFDM) systems. The exact signal-to-noise ratio (SNR) expression is derived in the presence of the frequency offset. Using this exact SNR expression, the SNR degradation due to the frequency offset is quantified and the symbol error rate (SER...

This paper describes the Customizable Coherent Demodulation Algorithm, a servo demodulator which provides dramatically improved performance over the currently used servo demodulation methods for disk drives. The demodulation algorithm proposed here makes better use of knowledge about the readback signal coming from the disk to provide better noise immunity and more immunity to other nonidealiti...

Satellite navigation signals demodulation performance is historically tested and compared in the Additive White Gaussian Noise propagation channel model which well simulates open areas. Nowadays, the majority of new applications targets dynamic users in urban environments; therefore the implementation of a simulation tool able to provide realistically GNSS signal demodulation performance in obs...

In order to access the fretting damage of the steam generator tube (SGT), a fast fiber Fabry-Perot (F-P) non-scanning correlation demodulation system based on a super luminescent light emitting diode (SLED) was performed. By demodulating the light signal coming out from the F-P force sensor, the radial collision force between the SGT and the tube support plate (TSP) was interrogated. For higher...

This paper proposes a new amplitude and phase demodulation scheme different from the traditional method for AM-FM signals. The traditional amplitude demodulation assumes that the amplitude should be non-negative, and the phase is obtained under the case of non-negative amplitude, which approximates the true amplitude and phase but distorts the true amplitude and phase in some cases. In this pap...

Analysis of amplitude and phase characteristics for delta, theta, and alpha bands at localized time instant from EEG signals is important for the characterizing information processing in the brain. In this paper, complex demodulation method was used to analyze EEG (Electroencephalographic) signal, particularly for auditory evoked potential response signal, with sufficient time resolution and de...