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Method of transmitting and receiving preamble sequences in an orthogonal frequency division multiplexing communication system

A technology of preamble sequence and multiplexing communication, which is applied in the field of OFDM communication system and can solve problems such as increased hardware load

Inactive Publication Date: 2006-03-15
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Since the MS needs as many correlators as the number of BSs to recognize the preamble, the hardware load increases

Method used

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  • Method of transmitting and receiving preamble sequences in an orthogonal frequency division multiplexing communication system
  • Method of transmitting and receiving preamble sequences in an orthogonal frequency division multiplexing communication system
  • Method of transmitting and receiving preamble sequences in an orthogonal frequency division multiplexing communication system

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Embodiment Construction

[0028] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

[0029] The present invention provides a method of transmitting and receiving a preamble in an OFDM communication system. More specifically, the present invention is directed to a scheme using MIMO, i.e. using multiple, eg N TX , transmit (Tx) antennas and multiple, for example N RX A method of transmitting and receiving a sequence having excellent autocorrelation properties as a preamble sequence, such as CAZAC (Constant Amplitude Zero Autocorrelation) or ZAC (Zero Autocorrelation) sequence, in the OFDM communication system of the receiving (Rx) antenna.

[0030] In a MIMO-OFDM communication system, the preamble sequence is designed for synchronization acquisition, channel estimat...

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Abstract

A method of transmitting and receiving preamble sequences in a transmitter in an OFDM communication system is provided. A transmitter segments a first sequence of a predetermined length into a predetermined number of second sequences, generates as many preamble sequences as the second sequences by applying different time offsets to the second sequences, selects a predetermined number of preamble sequences among the generated preamble sequences, maps the selected preamble sequences to the transmit antennas, and transmits the mapped preamble sequences through the transmit antennas.

Description

technical field [0001] The present invention generally relates to an OFDM (Orthogonal Frequency Division Multiplexing) communication system, and more particularly, to a method of transmitting and receiving a preamble in an OFDM communication system using a MIMO (Multiple Input Multiple Output) scheme. Background technique [0002] Currently, a great deal of research is being conducted in order to provide users with services with different QoS (Quality of Service) at high data rates in a future generation, such as the fourth generation (4G) communication system. More specifically, in order to guarantee mobility and QoS for BWA (Broadband Wireless Access) communication systems such as WLAN (Wireless Local Access Network) and MAN (Metropolitan Area Network), much effort is being made to support high-speed services. [0003] Therefore, OFDM is being studied as a useful scheme for high-speed data transmission on wired and wireless channels in 4G communic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2656H04L27/2657H04L27/2613H04B7/0667H04B7/04H04L27/2662H04L5/0048H04B7/0413H04J13/0059H04L27/2614H04L27/26134
Inventor 丁英镐郑在学黄赞洙南承勋
Owner SAMSUNG ELECTRONICS CO LTD
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