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Áp dụng DSP lập trình trong truyền thông di động P19

Next Generation Wireless Devices Wireless devices stand at a new frontier. Reduction in the cost and size of powerful processors allow handsets, PDAs and digital cameras to advance from single purpose devices to complete multimedia platforms. Broader bandwidth networks allow vastly expanded functionality in these devices. This platform is more than a small television or tiny computer. It is an entirely new medium with its own limitations and advantages. Most importantly it is used in a completely unique way. Exciting opportunities abound for content providers and users of these new devices. . | The Application of Programmable DSPs in Mobile Communications Edited by Alan Gatherer and Edgar Auslander Copyright 2002 John Wiley Sons Ltd ISBNs 0-471-48643-4 Hardback 0-470-84590-2 Electronic 19 The Pointing Wireless Device for Delivery of Location Based Applications Pamela Kerwin John Ellenby and Jeffrey Jay 19.1 Next Generation Wireless Devices Wireless devices stand at a new frontier. Reduction in the cost and size of powerful processors allow handsets PDAs and digital cameras to advance from single purpose devices to complete multimedia platforms. Broader bandwidth networks allow vastly expanded functionality in these devices. This platform is more than a small television or tiny computer. It is an entirely new medium with its own limitations and advantages. Most importantly it is used in a completely unique way. Exciting opportunities abound for content providers and users of these new devices. 19.2 The Platform Phones have daylight viewable color screens and significant processing power. They include technology that allows them to determine exactly where they are. They support Internet connectivity numerous applications video and music. However since they are pocket devices they remain small and input to these devices continues to be difficult. The devices put incredible power in a user s hand. The prospect of having immediate access to information and entertainment at any time wherever you may be is truly compelling. 19.3 New Multimedia Applications Certainly we are seeing new applications and content becoming available for these platforms. Users can download digital music and play interactive games. Enterprise applications travel programs video conferencing movie trailers etc. are all literally in the hand of the user. 380 The Application of Programmable DSPs in Mobile Communications 19.4 Location Based Information The ability to wander about with a position smart and powerful device in one s hands naturally encourages users to want to get information .