Synchronous pilot frequency sequence forming system and method in communication system

A sequence generation and synchronous pilot technology, applied in the direction of multi-frequency code system, etc., can solve the problems that cannot meet the communication system, low bit error rate index, etc., and achieve the goal of overcoming frequency offset estimation error and improving frequency offset estimation performance Effect

Inactive Publication Date: 2009-12-16
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

For a multi-carrier system, the use of this single-frequency pilot sequence with a comb-like spectrum obviously introduces ICI, which cannot meet the lower bit error rate index required by the communication system

Method used

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  • Synchronous pilot frequency sequence forming system and method in communication system
  • Synchronous pilot frequency sequence forming system and method in communication system
  • Synchronous pilot frequency sequence forming system and method in communication system

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Embodiment Construction

[0054] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0055] In order to improve the performance of frequency offset estimation, the present invention proposes a synchronization pilot sequence for frequency offset estimation. figure 2 It is a schematic diagram of the discrete frequency spectrum of the synchronization pilot sequence according to the present invention. Such as figure 2 As shown, the synchronous pilot sequence is mainly composed of two parts: one part is a discrete frequency spectral line with zero power spectrum, which is called broadband component; the other part contains only one discrete frequency spectral line, that is, single-frequency pilot, called narrowband components.

[0056] The single-frequency pilot contained in the synchronous pilot sequence can change th...

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Abstract

The invention discloses a synchronous pilot sequence generation system in a communication system. The system includes: a baseband signal sequence generation unit, used to generate a baseband signal sequence; a power adjustment unit, used to convert the baseband signal sequence generated by the baseband signal sequence generation unit to The signal sequence is multiplied by different coefficients, so that the power of the discrete spectral line corresponding to a part of the baseband signal sequence is zero, and the discrete spectral line corresponding to the other part of the baseband signal sequence is a single-frequency pilot; the multiplexing unit, the power adjustment unit The output baseband signal sequence is multiplexed into one channel of data and sent to the random frequency hopping unit; the random frequency hopping unit is used to randomly change the spectrum position of the single-frequency pilot in the synchronization channel of each frame; the synchronization pilot sequence generation unit uses The synchronization pilot sequence is generated according to the data after random frequency hopping. After applying the invention, the generated synchronous pilot sequence can significantly improve the frequency offset estimation performance.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, the present invention relates to a system and method for generating a synchronization pilot sequence in a communication system. Background technique [0002] At present, Global System for Mobile Communications (GSM) and Code Division Multiple Access (CDMA) mobile communication systems have been widely used all over the world, while Wideband Code Division Multiple Access (WCDMA) and Code Division Multiple Access 2000 ( CDMA2000) and other mobile communication systems have also been applied within a certain range. Orthogonal frequency division multiplexing (OFDM) technology has the ability to resist inter-symbol interference (ISI) and can provide high spectral efficiency, so it is regarded as one of the most likely transmission technologies for the next generation of wireless mobile communication systems. OFDM technology has been widely used in many fiel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
Inventor 杨学志孙卫军江浩刘皓
Owner HUAWEI TECH CO LTD
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