This paper illustrates on an approach to control a mobile robot using DTMF tone through the GSM network. DTMF tones to control a mobile robot are generated by pressing the keypad buttons of a GSM mobile which is counted as remote. The robot receives the tones using another GSM mobile stuck with it. The mobile robot perceives the control tone by using a DTMF decoder IC and a preprogrammed microp...

In this paper, we have extended our previous research on a new approach to ASR in the GSM environment. Instead of recognizing from the decoded speech signal, our system works from the digital speech representation used by the GSM encoder. We have compared the performance of a conventional system and the one we propose on a speaker independent, isolateddigit ASR task. For the half and full-rate ...

Spectrum efficiency of CDMA compared with TDMA. CDMA Vs TDMA in travel. Differences between CDMA and TDMA.WCDMA is Wideband CDMA that still uses code division to divide the channels. The most major difference between CDMA and WCDMA is in the group of.Its first of the two part lectures which will cover GSM and CDMA, the. SIM is portable and therefore transferable between mobile stations or your ...

Home security system is needed for convenience and safety. This system invented to keep home safe from intruder. In this work, we present the design and implementation of a GSM based wireless home security system. which take a very less power. The system is a wireless home network which contains a GSM modem and magnet with relay which are door security nodes. The system can response rapidly as ...

As has been widely discussed, the GSM mobile telephony system only offers unilateral authentication of the mobile phone to the network; this limitation permits a range of attacks. While adding support for mutual authentication would be highly beneficial, changing the way GSM serving networks operate is not practical. This paper proposes a novel modification to the relationship between a Subscri...

Inspired by recent TSG GERAN (Technical Specification Group GSM EDGE Radio Access Network) contributions, we propose a multiple–input multiple–output (MIMO) transmission scheme for GSM/EDGE (Enhanced Data Rates for GSM Evolution) with two antennas on each side. Performance is compared to that of single–antenna transmission with one and two receive antennas, respectively. Also, an approximation ...

In this paper, we discuss security issues associated with mobile telephone networks and focus on the unique issues that appear due to the mobility of the user. We provide an overview of how some of these issues are addressed in the second-generation mobile network GSM and consider some of the possible shortcomings of that network. We then compare security features in GSM with those implemented ...

Gas hydrates have lately received increased attention as a potential future energy source, which is not surprising given their global and widespread occurrence. This article presents an integrated study of the Nyegga site offshore mid-Norway, where a gas hydrate prospect is defined on the basis of a multitude of geophysical models and one shallow geotechnical borehole. This prospect appears to ...