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Dynamic differentiated link adaptation for ultra-wideband communication system

A communication system and link adaptation technology, applied in the transmission system, pulse position modulation, electrical components, etc., can solve the problem of time diversity and reduce the maximum data rate

Inactive Publication Date: 2007-07-18
NEW JERSEY INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Unfortunately, the use of time diversity reduces the maximum achievable data rate for this system

Method used

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  • Dynamic differentiated link adaptation for ultra-wideband communication system
  • Dynamic differentiated link adaptation for ultra-wideband communication system
  • Dynamic differentiated link adaptation for ultra-wideband communication system

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Embodiment Construction

[0019] In the following description, certain terms are used interchangeably. The term "user" is interchangeable with the terms "mobile", "mobile station" and "mobile user". The term "base station" is also used interchangeably with the term "base". These uses are by no means limiting.

[0020] The invention relates to the dynamic adaptation of the number of pulses per symbol (bit) for each UWB radio link. Since each link can be adapted to change independently of other user links, the adaptation of each link can be differentiated. Dynamic Differential Link Adaptation UWB has no restrictions on its application among different users, and the adaptation can be performed independently for each user, specifying the data rate required for each situation. This feature allows to differentiate the quality of service for different users.

[0021] FIG. 1 shows a simplified system diagram for a typical wireless communication network 100 . Wireless communication network 100 includes a n...

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Abstract

Optimum usage of time diversity and significantly higher data rates are achieved by utilizing an adaptive Ultra-wideband impulse radio (UWB IR) transmission scheme based upon information about the channel state at a particular time instant. Through the use of channel state information (422), the transmission scheme (413) is adjusted for the particular channel state. In particular, the system is adapted dynamically for each user by varying the number of pulses (412) transmitted per bit in response to the channel state. The channel state is a dynamic parameter of the transmission system that is typically measured or estimated by the receiver (420). An adaptation element responds to the channel state information to determine a desired number of pulses per bit to be utilized in a transmission channel for subsequent UWB IR communication. This desired number of pulses per bit is then supplied to and used by an adaptive transmitter (410) for subsequent transmission by a particular mobile station.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority from US Provisional Patent Application Serial No. 60 / 551,397, filed March 9,2004. The above Provisional Patent Application is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a method and device for wireless communication, and more particularly, to adaptive transmission in an ultra-wideband communication system. Background technique [0004] Ultra-wideband (UWB) communication systems generally involve wireless transmissions with a 3dB bandwidth occupying more than 25% of the center frequency of the wireless transmission, or more than 1.5GHz. Ultra-wideband impulse radio (IR) systems communicate using baseband pulses of very short duration, typically on the order of nanoseconds, so that the energy of the radio signal is very sparsely spread over a wide bandwidth. In these systems, an energy spread of about a few ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K7/04H04B1/69
CPCH04B1/7183H04B1/7176H04B1/719
Inventor 耶海斯克尔·巴-内斯若尔迪·迪亚兹
Owner NEW JERSEY INSTITUTE OF TECHNOLOGY
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