This paper presents a novel approach to achieving high spatial resolution in the demodulation of images produced by a two-dimensional X-ray Talbot interferometry (XTI) system. Currently, demodulation of XTI images is mainly performed by either phase-stepping (PS) or Fourier transform (FT) methods. However, the PS method for two-dimensional XTI demodulation requires a larger number of exposures ...

In our Software Defined Radio SDR project we aim at combining two different types of standards, Bluetooth and HiperLAN/2 on one common hardware platform. Goal of our project is to generate knowledge about designing the front end of an SDR system (from the antenna signal to the channel bit stream) where especially an approach from both analog and digital perspective is essential. Bluetooth uses ...

In this study, a simple chaos communication system including modulation-demodulation circuits is studied. The influence of modulation-demodulation circuits to chaos synchronization is investigated. For the estimation of communication quality, bit error rate (BER) is calculated by computer simulation when a sequential random pulse information signal is transmitted via this proposed system. key w...

Capacity Estimation and Code Design Principles for Continuous Phase Modulation (CPM). (May 2003) Aravind Ganesan, B.Tech., Indian Institute of Technology, Madras Chair of Advisory Committee: Dr. Krishna R. Narayanan Continuous Phase Modulation is a popular digital modulation scheme for systems which have tight spectral efficiency and Peak-to-Average ratio (PAR) constraints. In this thesis we pr...

It is shown that multiple complementary techniques for trading BER performance for cost reduction in the Viterbi algorithm for multipleinput/multiple-output joint demodulation can be merged to obtain substantial and efficient cost reduction. Quantitative results for application to the separation of GSM cochannel signals are presented. It is shown that up to six signals can be separated at a GSM...

In this paper, we focus our attention on blind demodulation for DS-CDMA transmission in the context of radio surveillance and military applications. We present a blind demodulation technique for DS-CDMA transmission over frequency selective channels. The technique exploits the autocorrelation properties of the transmitted signal to estimate the parameters (symbol duration, timing offset, phase ...

Using a standard 0.18um CMOS process with a buried photodiode (BPD) option, test pixels with a single transfer gate were characterized. The test pixels enabled finding an optimized BPD layout that minimizes the potential barriers hindering the charge transfer. Demodulation pixels having a 6.3um pitch or less were then developed and demonstrated to demodulate light signals up to at least 50MHz. ...