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Auxiliary synchronous sequence detection method and device for long-term evolution system

A long-term evolution system and secondary synchronization sequence technology, which is applied in multi-frequency code systems, baseband system components, and shaping networks in transmitters/receivers, and can solve problems such as unpublished LTE system SSC detection methods

Active Publication Date: 2011-05-11
LEADCORE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0030] There is currently no public SSC detection method for LTE systems

Method used

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  • Auxiliary synchronous sequence detection method and device for long-term evolution system
  • Auxiliary synchronous sequence detection method and device for long-term evolution system
  • Auxiliary synchronous sequence detection method and device for long-term evolution system

Examples

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no. 1 example

[0066] The detection device of the first embodiment of the present invention is as image 3 As shown, it includes an equalization module 110 , a deinterleaving and descrambling module 120 , a correlation module 130 , an absolute value acquisition and summation module 140 , a correlation value selection module 150 and a decision module 160 . Correspondingly, the detection method flow chart of the first embodiment of the present invention is as follows Figure 4 shown.

[0067] Firstly, in step S101, an equalization process is performed on the received SSC signal. This may be performed by equalization module 110 . The input of the equalization module 110 is the received original SSC signal, and the channel estimation based on the PSC (Primary Synchronization Code, primary synchronization code) signal of the 5ms frame where the SSC signal is located, and the output of the equalization module 110 is the equalized SSC signal.

[0068] In a preferred embodiment, the further struc...

no. 2 example

[0142] The detection device of the second embodiment of the present invention is as Figure 8 As shown, it includes an equalization module 210 , a deinterleaving and descrambling module 220 , a correlation module 230 , a correlation value selection module 240 and a decision module 250 . Correspondingly, the detection method flow chart of the second embodiment of the present invention is as follows Figure 9 shown.

[0143] Firstly, in step S201, the received SSC signal is equalized. This may be performed by equalization module 210 . In this step S201, the received 1 5ms frame SSC signal and PSC channel estimation are transformed into frequency domain, DC subcarrier and 0 subcarrier are deleted and rearranged. For the method of FFT transformation and carrier rearrangement, please refer to the first embodiment. After this step, the result shown in formula (0.8) is obtained:

[0144] Then, perform coherent correction by multiplying the conjugate of the SSC signal and the PSC...

no. 3 example

[0172] The detection device of the third embodiment of the present invention is as Figure 10 As shown, it includes an FFT transformation and rearrangement module 310 , a deinterleaving and descrambling module 320 , a correlation module 330 , a correlation value selection module 340 and a decision module 350 . Correspondingly, the detection method flow chart of the third embodiment of the present invention is as follows Figure 11 shown.

[0173]First, in step S301 , the FFT transformation and rearrangement module 310 performs FFT transformation and rearrangement. In this step, a 5ms frame data is received, and 64 SSC data are received according to the 0.96MHz bandwidth and 0.96MHz sampling rate according to the PSC timing position Then FFT transformation is performed to make it a frequency domain signal, and then the DC subcarrier and 0 subcarrier are deleted and rearranged. Please refer to the second embodiment for the method of FFT transformation and carrier rearrangeme...

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Abstract

The invention relates to an auxiliary synchronous sequence detection method for a long-term evolution system. The auxiliary synchronous sequence detection method comprises the following steps of: firstly, performing fast Fourier transform (FFT) on a received auxiliary synchronous signal to convert the received auxiliary synchronous signal into a frequency domain signal; rearranging carriers; performing de-interweaving and descrambling process; performing circular correlation on the de-interweaved and descrambled signal; selecting a relevance value and an index value corresponding to the relevance value in a circular correlation result; selecting an index pair with highest credibility according to the selected relevance values; and calculating the number in a cell set according to the index pair.

Description

technical field [0001] The invention relates to a long-term evolution system (LTE) in communication, especially a secondary synchronization sequence detection method and device in the long-term evolution system. Background technique [0002] In response to the rapid rise of the Worldwide Interoperability for Microwave Access (WiMAX) technology, 3GPP launched the Long Term Evolution (LTE) plan for the Universal Mobile Telecommunications System (UMTS) technology at the end of 2004. The purpose of this plan is to introduce a new wireless air interface and various advanced technologies in order to achieve greater transmission rates, smaller access delays and greater system capacity. According to the current LTE standard, the system supports a maximum peak rate of 300Mbps for downlink and a maximum peak rate of 75Mbps for uplink. [0003] During the cell search process of the LTE system, a secondary synchronization code (Secondary Synchronization Code, SSC) needs to be detected ...

Claims

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Application Information

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IPC IPC(8): H04L27/01H04L27/26H04L25/03
Inventor 邓瑞楠罗新郭华永刘光军
Owner LEADCORE TECH
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