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Symbol timing synchronization is an important component in communication systems. The quality and reliability of wireless network communication will improve with accurate symbol timing recovery. In this paper, we present a symbol timing synchronization method by interpolating the samples at the output of the matched filter to compute the desired time instants. Since interpolation jitter is the major...
The increasing popularity of Software Defined Radio is forcing complex digital signal processing blocks to be implemented in parallel design flow on FPGA or ASIC. Digital filters are necessary in transmitter / receiver side and FIR filters are often chosen for their beneficial properties against IIR filters. Symbol synchronization subsystem also maintains digital filters for interpolation purpose...
This paper describes the hardware efficient implementation of Non data aided method for Symbol timing Synchronization and Carrier phase synchronization for 16-QAM on Kintex 7 FPGA using a feedback structure. Costas loop is used for Carrier phase synchronization and pre-filtering is done for Symbol timing Synchronization to extract the symbol timing information. The performance of the receiver is tested...
The increasing popularity of Software Defined Radio is forcing complex digital signal processing blocks to be implemented in parallel design flow on FPGA or ASIC. One of the main sections of digital receiver is symbol synchronization block. The goal of this paper is to develop efficient Non-Data-Aided (NDA) feedback PLL-based synchronization scheme in VHDL language for RTL synthesis on FPGA. The first...
This work proposes an effective code acquisition technique for Galileo BOC signals, exploiting a fast parabolic interpolator running on three estimated ambiguity samples in the neighbourhood of the coarse estimate. Performance analysis is carried out in comparison with the conventional approach, based on the power detector test. The numerical results, obtained from wide simulation trials under operating...
This contribution proposes an effective procedure for the acquisition of pseudo-noise code in satellite spread-spectrum localization systems. The main contribution of our work is twofold: first, we define a new objective function that is able to exploit the capabilities of different detectors in only one ambiguity function. Then, we introduce a compound detection procedure that, taking advantage of...
Satellite-based localization has attracted ever growing attention in the last few years. In this work, we present a signal processing technique for initial code acquisition and synchronization of satellite signals, such as the one used by position location techniques. Conventional approaches are based on the interpolation, usually carried out by (time-consuming) narrow-band over-sampling or (fast)...
In a communication system the receiver has to be synchronized to the incoming data signal in order to rebuild the transmitted data. Therefore a timing recovery circuit is necessary. Most known implementations of this feature assume that in a digital receiver the samples are processed one after another. This is not true for high speed receivers that are clocked at some stage with a rate less than the...
Securing any type of multi media data by digital watermarking techniques has gained publicity as a curtail issue for research in the present word. To meet certain market requirements a thorough research work was carried out, the findings of which is presented in this paper. The undertaken procedure has been based on proposing a new image-watermarking algorithm to overcome the RST attacks. The so-called...
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