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Synchronous pilot frequency sequence forming system and method in communication system

A technology of sequence generation and synchronizing pilot frequency, applied in the direction of multi-frequency code system, etc., can solve the problems of inability to meet the communication system, low bit error rate index, etc., to overcome the error of frequency offset estimation and improve the performance of frequency offset estimation. Effect

Inactive Publication Date: 2007-07-25
HUAWEI TECH CO LTD
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AI Technical Summary

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. FIG. 2 is a schematic diagram of discrete frequency spectrum lines of the synchronization pilot sequence according to the present invention. As shown in Figure 2, 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 the narrowband component.

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

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Abstract

The system comprises: a baseband signal sequence generator for generating baseband signal sequence; a power control unit for respectively multiplying the baseband signal sequences by different coefficients in order to make the power of discrete spectrum line corresponding to one part of the baseband signal sequence to be as zero, and make the discrete spectrum line corresponding to another part of the discrete spectrum to be as single-frequency pilot frequency; a multiplexing unit for multiplexing the baseband signal sequence outputted from power control unit into one route of data transmitted to the random frequency hopping unit; a random frequency hopping unit for randomly changing the frequency spectrum position of single-frequency pilot frequency in synchronous channel of each frame; and a synchronous pilot frequency generating unit for generating synchronous pilot frequency sequence according to the data after random frequency hopping.

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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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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