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ZC (zone code) sequence detection method and device in high-speed mode

A high-speed mode and sequence detection technology, applied in the direction of shaping network, baseband system components, multi-frequency code system, etc.

Inactive Publication Date: 2013-11-20
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In short, how to better support users with relatively low moving speed or relatively stationary users in the wireless communication supporting high-speed relative movement, the existing patent literature does not propose a more effective solution

Method used

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  • ZC (zone code) sequence detection method and device in high-speed mode
  • ZC (zone code) sequence detection method and device in high-speed mode
  • ZC (zone code) sequence detection method and device in high-speed mode

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Embodiment Construction

[0071] Such as figure 1 As shown, when the received ZC sequence with frequency deviation (represented by the white rectangle) is correlated with the local ZC sequence (represented by the shaded rectangle), not only the peak appears in the detection window CS, but also in the detection window CS -1 and CS +1 A large peak appears (regardless of CS, CS -1 and CS +1 other components). figure 1 middle, d u Indicates the multiplication and inverse of u, mod(u·d u ,N ZC )=1, N ZC Indicates the length of the ZC sequence

[0072] A detection and timing device supporting high-speed users in the prior art such as figure 2 As shown, it includes a time-domain ZC sequence transmitter module 201, an equivalent multipath frequency offset module 202, and a local sequence correlator 203, a correlation sequence energy combination module 204, a noise estimation module 205, a window energy combination module 206, and peak monitoring and Timing module 207.

[0073] The time-domain ZC seq...

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Abstract

The invention provides a ZC (zone code) sequence detection method in a high-speed mode. The method comprises the following steps: relating a received ZC sequence signal with a local ZC sequence, performing the multi-antenna and repetitive energy combination on the related ZC sequence to obtain a combined related energy sequence; computing a noise power estimation Nu of the related energy sequence; setting respective threshold value ThreL, ThreM and ThreR of three detection windows CS, CS-1 and CS+1; respectively searching the energy maximum value of the three detection windows, and judging whether the energy maximum value is more than the product of a threshold value factor and a noise power estimation value; if any judgment result in the three judgments is yes, detecting the ZC sequence and timing the ZC sequence; and if the judgment results of three judgments are no, the ZC sequence being not detected. The invention further provides a ZC sequence detection method in a high-speed mode.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and device for detecting a ZC sequence in a high-speed mode. Background technique [0002] The ZC (ZadOff-Chu) sequence has ideal autocorrelation characteristics and the best cross-correlation characteristics between different ZC sequences. It is often used as a training sequence in communication systems (such as LTE) for synchronization, random access and spread spectrum communication. In high-speed applications, the Doppler effect or the frequency difference between the transmitting and receiving ends causes the frequency difference between the received signal and the local ZC reference signal, which brings challenges to ZC sequence detection and timing. [0003] Patent Document 1 (Chinese Application No. CN200910129962.6) proposes a scheme of peak detection after the correlation energy between multiple antennas is combined. Patent Document 2 (European ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03
Inventor 杨晓斌梁毅
Owner POTEVIO INFORMATION TECH CO LTD
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