Method and apparatus for arranging pilot tones in a mobile communication system

A technology of frequency tone and tone, which is applied in the field of broadcasting services and can solve problems such as channel estimation errors

Inactive Publication Date: 2007-10-17
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem of channel estimation error occurs even when assigning a small power value to the pilot tone 205 at the DC position

Method used

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  • Method and apparatus for arranging pilot tones in a mobile communication system
  • Method and apparatus for arranging pilot tones in a mobile communication system
  • Method and apparatus for arranging pilot tones in a mobile communication system

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Embodiment Construction

[0040] Hereinafter, specific example embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of functions and configurations incorporated herein that are well known to those skilled in the art will be omitted for clarity and conciseness.

[0041] In an embodiment of the present invention, a Broadcast and Multicast Service (BCMCS) technology is compatible with a High Rate Packet Data (HRPD) system, and is applied to an Orthogonal Frequency Division Multiplexing (OFDM) transmission system. The BCMCS technology can be applied to other OFDM-based broadcast systems.

[0042] When base stations (BSs) for transmitting different BCMCS contents arrange pilot tones in the same position, pilot tones of undesired BSs are reflected in channel estimation. To solve this problem, the BS uses Quadrature Phase Shift Keying (QPSK) spread spectrum processing. Because the signal of an undes...

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Abstract

An apparatus and method are provided for arranging tones to isolate signals between base stations (BSs) in a high rate packet data (HRPD) system. Packet data is received from a higher layer and the received packet data is channel-coded and modulated. Guard tones are inserted into symbols of the modulated packet data. Pilot tones are inserted using pilot tone arrangements based on preset pilot tone offsets. The packet data symbols to which the pilot tone arrangements have been applied are spread such that BSs for transmitting different broadcast contents are distinguished from each other. A cyclic prefix (CP) is inserted after performing an inverse Fourier transform on the spread packet data symbols, and the symbols are transmitted.

Description

technical field [0001] The present invention generally relates to a method and apparatus for providing a broadcast service in a mobile communication system for providing wireless packets. More particularly, the present invention relates to a method and apparatus for arranging pilot tones in a broadcasting system using an Orthogonal Frequency Division Multiplexing (OFDM) transmission scheme. Background technique [0002] Conventional wireless transmission schemes for broadcast and multicast services (BCMCS) have been developed for the purpose of fixed reception and low-speed mobile reception. Recently, a technology capable of receiving BCMCS using a small terminal in a high-speed mobile environment has been developed. Broadcasting technologies such as digital multimedia broadcasting (DMB) and digital video broadcasting-handheld (DVB-H) have been developed to receive video-grade broadcasts using small portable terminals. Also, research for developing the existing one-way bro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L5/0007H04B1/707H04L5/0048H04L5/0023H04L27/26
Inventor 韩臸奎权桓准金东熙金润善
Owner SAMSUNG ELECTRONICS CO LTD
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