Satellite Digital Audio Radio System (SDARS) modulation
Over the past decade, orthogonal frequency division multiplexing (OFDM) has been exploited for wideband communication over mobile radio FM channels, xDSL, DAB, SDARS, DTTB, DVB, and HDTV terrestrial broadcasting. Orthogonal frequency division multiplexing (OFDM) and related modulations schemes such as QAM and QPSK are combined into systems with multiple mobile receivers and transmitters to provide frequency, time, and spatial diversity ...
Man Machine Interface and Personal Digital Assistants
Communication devices such as telephones, cordless phones/headsets, cell phones, wireless two-way messengers and PDAs continue to become more ubiquitous, personal, and mobile. Communicating entities such as human beings, synthetic personal assistants, and information daemons, are faced with multiple scenarios for connecting to and being signaled for connection to by other communicating entities. . .
Streaming Media / Telecommunications / Internet
The Internet has become ubiquitously available as a distribution point for streaming delivery of audio/video content, both internal to (intranet) and external to (Internet/VPN) the enterprise. Businesses are increasingly using digital content to communicate with their employees, investors, and customers. Real-time and on demand news, sports scores, stock information, weather reports, movie times and reviews, streaming internet radio, personal announcements and greetings, restaurant reviews, driving directions, all are now available from multiple Internet sites, and portal. . .
VoIP and Emergency Communication
While the LECs struggle with regulatory compliance, businesses and consumers continue to demand the features associated with broadband voice services offered by cable multiple system operators, competitive LECs (CLECs), satellite operators, and other broadband service providers. However, they also desire the reliability and emergency support afforded by their POTS service. . .
Provisioning and Management of Complex, Distributed Communications Networks
As the bandwidth of communication channels increases, the tendency to share this bandwidth between multiple services (e.g., narrowband voice and broadband data, video, and multimedia) increases. Correspondingly, the problem of coordinating the provisioning of network elements that source, transport, and terminate these services also increases. . .
The recent explosion in the growth and availability of mobile devices (e.g., laptops, PDAs, and intelligent cellphones) combined with increasing corporate and government concerns with secure communication of confidential business and intelligence data has created a genuine interest, and probably a good business case, for efficient, mobile, security solutions that would allow "road warriors" and others to communicate securely with each other and with network-based resources (e.g., corporate servers, intranets, and secure web sites). The diversity of relevant devices and networks includes 3G wireless networks, wireless LANs, dial-up connections, broadband voice/video/data networks, and wired LANs. . .
Wireless User Assignment Strategies for 3G Networks
Some of the major challenges facing next-generation wireless networks lie in efficient resource allocation and mobility management strategies required to accommodate a large number of high data rate users. Hierarchical or multi-tier network architectures have recently been proposed for these applications. . .
Storage Area Networks
Many techniques have been developed to transport FC data through existing data and telecommunications networks. Products and systems are beginning to emerge that provide basic extensions of the physical links of FC. These basic-extension systems "stretch" the wire but often don't address system-level issues of FC performance (e.g., end-to-end flow control). Existing extension gateways can tunnel FC data over other transport protocols but