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Pilot design using Costas arrays

An array and pilot signal technology, applied in the field of communication systems, can solve problems such as insufficient dedicated pilot design

Inactive Publication Date: 2011-05-11
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing solutions based on Costas arrays are mainly for common pilots (they are intended to be used by all users), but not adequately designed for dedicated pilots (they are only intended to be used by users [e.g. dedicated to] receiving data transmissions)

Method used

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  • Pilot design using Costas arrays
  • Pilot design using Costas arrays
  • Pilot design using Costas arrays

Examples

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Embodiment Construction

[0043] For purposes of illustration rather than limitation, specific details such as specific architectures, interfaces, techniques, etc. are set forth in the following description in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments that deviate from these specific details. That is, those skilled in the art will be able to devise various arrangements which, although not explicitly described or illustrated herein, embody the principles of the invention and are therefore encompassed within its spirit and scope. In some instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail. All statements herein reciting principles, aspects, and embodiments of the invention, as well as specific examples thereof, are intended to encompass structura...

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Abstract

A multi-pilot frame handler (36) of a radio access network node (28) is arranged to prepare a block of a frame of information to include a first pilot signal of a pilot signal first type and a first pilot signal of a pilot signal second type. The pilot signal of the pilot signal first type is expressed as a first Costas array base pattern of resource elements of the block; the pilot signal of the second type is expressed as a second Costas array base pattern of resource elements of the block. The multi-pilot frame handler (36) is arranged to prepare the block so that any pilot signal of the pilot signal first type is carried by at least some subcarriers of a first set of subcarriers of the block and any pilot signal of the pilot signal second type is carried by at least some subcarriers of a second set of subcarriers of the block.

Description

technical field [0001] This application claims priority benefit to US Provisional Patent Application 61 / 043980, entitled "Pilot Design Using a Costas Array," filed April 10, 2008, which is hereby incorporated by reference in its entirety. [0002] The present invention relates to communication systems and in particular to communication systems using pilot patterns for functions such as synchronization, channel estimation, fine time-of-arrival estimation and / or device identification. Background technique [0003] In a typical cellular radio system, wireless terminals (also called mobile terminals, mobile stations and mobile user equipment units (UEs)) communicate with one or more core networks via base stations of a radio access network (RAN). Wireless terminals (WT) may be mobile stations, such as mobile telephones ("cellular" telephones) and laptop computers with mobile terminals, and thus may be, for example, portable, pocket, hand-held, computer built-in, or vehicle-mount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L5/00
CPCH04L5/0007H04L5/005H04L27/2613H04L27/26134H04L5/0048H04L5/0051H04W72/0446
Inventor H·库拉帕蒂桂建卿K·巴拉錢德兰R·拉梅斯
Owner TELEFON AB LM ERICSSON (PUBL)