822 search results - page 136 / 165 » Wireless course management system |
CISS
2008
IEEE
13 years 12 months ago
2008
IEEE
A non-regenerative dual-hop wireless system based on distributed Alamouti space-time coding is considered. It is assumed that each relay retransmits an appropriately scaled space-t...
DMSN
2005
ACM
13 years 11 months ago
2005
ACM
In this paper, we introduce a rotating interrogation technique for sensor networks called Whirlpool. Whirlpool provides opportunities to optimize data delivery in time-critical mo...
CSREAEEE
2006
13 years 11 months ago
2006
Recently, most wired telecom service carriers are faced to decreasing of the number of subscriber because of the expansion of wireless market and blocking of net earnings. To over...
GIS
2008
ACM
13 years 11 months ago
2008
ACM
With the growth of wireless and mobile technologies, we are witnessing an increase in location-based services (LBS). Although LBS provide enhanced functionalities, they open up ne...
JSAC
2006
13 years 9 months ago
2006
One of the major challenges in supporting multimedia services over Internet protocol (IP)-based code-division multiple-access (CDMA) wireless networks is the quality-of-service (Qo...