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Method and apparatus for generating data packets for transmission in an OFDM communication system

A communication system and data packet technology, which is applied in the field of generating data packets transmitted in an OFDM communication system, and can solve problems such as increasing device power consumption

Active Publication Date: 2009-09-02
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, generating the preamble in the frequency domain alone can significantly increase the power consumption of the device

Method used

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  • Method and apparatus for generating data packets for transmission in an OFDM communication system
  • Method and apparatus for generating data packets for transmission in an OFDM communication system
  • Method and apparatus for generating data packets for transmission in an OFDM communication system

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Embodiment Construction

[0030] Although the preferred embodiment is described with reference to a WiMedia PHY, it will be appreciated that the invention is applicable to most packet-based communication systems.

[0031] Now refer to image 3A transmitter according to a preferred embodiment is described. The transmitter 300 includes a configuration interface 303 . The configuration interface 303 is connected to a data loader and controller 307 and to an inverse Fast Fourier Transformer (IFFT) 309 . An interleaver 305 is connected to a mapper and time spreader 311 . The mapper and time spreader 311 is connected to a precompensation / DFS processor 313 . Data loader and controller 307 is connected to precompensation / DFS processor 313 . The preamble memory 315 is also connected to the precomp / DFS processor 313 . The output of IFFT 309 is connected to output terminal 317 . The interleaver 305 is connected to an input terminal 319 .

[0032] refer to image 3 and Figure 4 The operation of the trans...

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PUM

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Abstract

Method and apparatus for generating data packets for transmission in an orthogonal frequency division modulated communication system, in which preamble sequence for each packet is generated in the frequency domain or the time domain depending on at least two conditions to save power consumption and enable implementation in a single CMOS chip.

Description

technical field [0001] The present invention relates to methods and devices for generating data packets for transmission in an OFDM communication system. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) systems have gained considerable popularity in recent years, partly due to their inherent multiplexing properties. Several standards established over the past few years (eg, 802.11a, 802.11g, DVB-T, etc.) use an OFDM-based physical layer (PHY). Most of these standards are for packet-based applications such as Wireless Local Area Networks (WLAN) and Wireless Personal Area Networks (WPAN). In these OFDM systems, data is transmitted in short bursts, typically kilobytes. Each packet transmission then includes fields dedicated to packet detection and channel estimation. This information is transmitted as a preamble at the beginning of each packet. A leader consists of several symbols that can be derived from a source symbol. For example, WiMedia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B1/69
CPCH04W52/02H04L27/2602H04W52/0212H04L27/2626Y02D30/70
Inventor 普天岩
Owner NXP BV