∗ School of Electrical Engineering and Computer Science, Ohio University, Athens, OH 45701, email: [email protected], [email protected], tel: (740)593-1580, fax: (740)593-0007. Abstract − This paper presents a novel P-code generator design strategy and direct GPS P-code acquisition technique. This method not only helps software simulation and simplifies FPGA hardware desi...

This paper discusses a code acquisition technique, for use in spread-spectrum communication system with large frequency offsets, where the frequency offset is similar to the symbol rate. This is the situation typically in satellite communications systems. The technique uses a very efficient method of performing the correlation where the frequency and time space can be searched with very little ...

In this study we investigate acquisition (code offset and channel state estimation) of multiple direct sequence spread spectrum DSSS signals in a multi-antenna ad hoc network. We derive the form of the optimal acquisition algorithm and show that it is NP-complete. We then derive a tractable suboptimal approach where we use a successive multistage cancellation approach in estimating the initial ...

In this paper, we propose an enhanced code acquisition scheme for optical code division multiple access (CDMA) systems. By using multiple thresholds, the proposed scheme provides a shorter mean acquisition time (MAT) than that of the conventional multiple-shift (MS) scheme. The simulation results demonstrate that the MAT of the proposed scheme is shorter than that of the conventional MS scheme ...

In this paper, we address the cell averaging (CA), greatest of (GO), and smallest of (SO) constant false alarm rate (CFAR) processors for code acquisition in homogeneous and nonhomogeneous environment. The performance characteristics of the CA, GO, and SO processors are obtained and compared when receiving antenna diversity is employed in the pseudonoise code acquisition of direct-sequence code...

The rapid admission of information and communication technologies (ICT) into all the pores of social and economic life has (fortunately) included the education sphere: the ever-growing need for new knowledge acquisition methods unambiguously points to a need to step outside the established, analogue education systems into the digital, virtual educational space. Over the past few years, blogs, w...

In this paper, a low complexity long pseudo noise (PN) code acquisition scheme is proposed for spread spectrum systems including global positioning system (GPS) and code division multiple access (CDMA) system. By using a phaseshift-network, the proposed scheme has less complexity than the conventional dual correlating sequential estimation scheme. From the analytic and numerical results, it is ...