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Method of and generator for generating preamble sequences in communication systems

A technology of a preamble sequence and a wireless communication system, applied in the field of generating a preamble sequence, a method and a generator

Active Publication Date: 2009-01-14
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some applications, the length of the traditional preamble may not be an integer multiple of P

Method used

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  • Method of and generator for generating preamble sequences in communication systems
  • Method of and generator for generating preamble sequences in communication systems
  • Method of and generator for generating preamble sequences in communication systems

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Embodiment Construction

[0046] In order to further understand the purpose, structure, features, and functions of the present invention, the following detailed descriptions are given in conjunction with the embodiments and corresponding drawings. The same reference numbers are used in the drawings to refer to the same or similar parts.

[0047] Figure 1A is a schematic diagram of an exemplary preamble 10 in the time domain of a conventional system. Figure 1B is a schematic diagram of an exemplary preamble 12 in the frequency domain of the conventional system. In an Orthogonal Frequency Division Modulation (OFDM) system or an OFDM-based system, a preamble or preamble sequence can be used to synchronize the frequency between the base station and the mobile station. Specifically, a preamble sequence indicating the start of the frame may be transmitted for a predetermined period starting from the start of the frame.

[0048] refer to Figure 1A , the time-domain preamble 10 may include K consecutive w...

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PUM

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Abstract

A method forms a preamble sequence in a wireless communication system. The method comprises determining a value K related to a time-domain characteristic of the wireless communication system so that a time-domain preamble sequence includes a number of K waveforms similar in shape to one another having a linear phase shift, identifying a first preamble sequence for a first band, the first preamble sequence having a first length not dividable by K, identifying at least one second preamble sequence each for a second band, the at least one second preamble sequence having at least one second length, identifying the length of a third preamble sequence, the length of the third preamble sequence equal to a sum of the first length and the at least one second length, determining whether the time-domain characteristic is maintained when the one or more of the at least one second preamble sequence is concatenated with the first preamble sequence, modifying one or more of the at least one second preamble sequence if the time-domain characteristic is not maintained when concatenated, and forming the third preamble sequence by concatenating the first preamble sequence and the at least one second preamble sequence having one or more second preamble sequence modified.

Description

technical field [0001] The present invention relates to communication systems. More specifically, the present invention relates to a method and a generator for generating a preamble in a communication system. Background technique [0002] In a wireless communication system, a mobile device can access a basic station such as a base station or a relay station by detecting a preamble sequence. In general, a preamble in the time domain may include a periodic shape, which may exhibit time domain characteristics. In addition, the time-domain characteristics can be maintained in the frequency-domain preambles of the legacy system and the new system. As long as the receiver of the mobile device detects the associated preamble of the communication system, the mobile device can connect to the communication system. In a multi-carrier communication system such as an Orthogonal Frequency Division Modulation (OFDM) system or an OFDM-based system, the preamble sequence of length-64 can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B7/26
CPCH04B2201/70701H04L27/2605H04J13/107
Inventor 郑延修萧昌龙冯文生
Owner IND TECH RES INST