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Method for transmitting dedicated demodulation signal and equipment thereof

A technology for demodulating signals and equipment, applied in the field of communication, can solve problems such as PSS conflicts, achieve the effect of reducing conflicts and ensuring demodulation performance

Inactive Publication Date: 2014-10-15
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The embodiment of the present invention provides a method and device for transmitting a dedicated demodulation signal to solve the conflict between the transmission of a dedicated demodulation signal and the transmission of PSS under the TDD system in the prior art

Method used

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  • Method for transmitting dedicated demodulation signal and equipment thereof
  • Method for transmitting dedicated demodulation signal and equipment thereof
  • Method for transmitting dedicated demodulation signal and equipment thereof

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Experimental program
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Embodiment 1

[0050] In the solution of the first embodiment, the DwPTS in the SPS occupies 11 to 12 OFDM symbols. In order to avoid the time-frequency unit for transmitting the PSS in TDD, the OFDM symbol used to transmit the DMRS should exclude the third OFDM symbol; in addition, In order not to conflict with the transmission of the CRS in the SPS, the OFDM symbols used to transmit the DMRS should also exclude the first, fifth and eighth OFDM symbols. Among the OFDM symbols occupied by DwPTS, except for the 4 OFDM symbols excluded above, other OFDM symbols can be used to transmit DMRS.

[0051] Specifically, the mode of transmitting DMRS in the first embodiment can be shown in Figure 7(a) to Figure 7(c) respectively:

[0052] As shown in Figure 7(a), the 2nd, 4th, 6th and 7th OFDM symbols in the OFDM symbols occupied by DwPTS are used as OFDM symbols for DMRS transmission. In this case, DMRS is transmitted and It does not conflict with the transmission of PSS / SSS in the TDD system, and t...

Embodiment 2

[0058] Similar to Embodiment 1, in the solution of Embodiment 2, the DwPTS in SPS occupies 9 to 10 OFDM symbols. In order to avoid the time-frequency unit for transmitting PSS in TDD, the OFDM symbols used to transmit DMRS should be Exclude the third OFDM symbol; in addition, in order not to conflict with the transmission of the CRS in the SPS, the OFDM symbols used to transmit the DMRS should also exclude the first, fifth and eighth OFDM symbols. Among the OFDM symbols occupied by DwPTS, except for the 4 OFDM symbols excluded above, other OFDM symbols can be used to transmit DMRS.

[0059] Specifically, the mode of transmitting DMRS in the second embodiment can be as follows Figure 9 Shown:

[0060] The 2nd, 4th, 6th and 7th OFDM symbols in the OFDM symbols occupied by DwPTS are used as OFDM symbols for DMRS transmission. In this case, the transmission of DMRS is not the same as the transmission of PSS / SSS in the TDD system. conflict, and the mode of CSI-RS transmission in...

Embodiment 3

[0064] The third embodiment is described by taking the case that the DwPTS in the SPS occupies 6 OFDM symbols. In order to avoid the time-frequency unit for transmitting PSS in TDD, the OFDM symbol used to transmit DMRS should exclude the third OFDM symbol; in addition, in order not to conflict with the transmission of CRS in SPS, the OFDM symbol used to transmit DMRS should also exclude the third OFDM symbol 1st and 5th OFDM symbols. Among the OFDM symbols occupied by DwPTS, except for the three OFDM symbols excluded above, other OFDM symbols can be used to transmit DMRS.

[0065] Specifically, the mode of transmitting DMRS in the third embodiment can be as follows Figure 10 Shown:

[0066] The 2nd and 4th OFDM symbols in the OFDM symbols occupied by DwPTS are used as OFDM symbols for DMRS transmission. In this case, the transmission of DMRS does not conflict with the transmission of PSS / SSS in the TDD system, nor will it conflict with the FDD The transmission PSS / SSS und...

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Abstract

The invention discloses a method for transmitting a DMRS and equipment thereof. The main contents comprise that when a new DMRS transmission mode is configured, use of OFDM symbols distributed for the DMRS avoids the OFDM symbols used for transmitting a PSS / SSS in a TDD. A time-frequency unit used for transmitting the PSS / SSS in the TDD is avoided, and conflict with other signal transmission is reduced as far as possible so that demodulation performance after DMRS and PSS / SSS transmission can be guaranteed when the new DMRS transmission mode configured by the embodiment of the invention is utilized.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for transmitting a dedicated demodulation signal (Demodulation Reference Signal, DMRS). Background technique [0002] In the R10 downlink system of the long-term evolution standard (Time Division Long term evaluation, LTE), the mode of transmitting DMRS is as follows: figure 1 As shown, in a special subframe (SPS) containing 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols, in the 6th, 7th, 13th and 14th The DMRS is transmitted on the OFDM symbols, and the common pilot signal (Cell-specific RS, CRS) is transmitted on the 1st, 5th, 8th and 12th OFDM symbols. [0003] figure 1 The shown mode of transmitting DMRS in the R10 system has the following two problems: [0004] Question 1, [0005] Under the frequency division duplex (FDD) system, the primary synchronization signal (PSS) / secondary synchronization signal (SSS) is transmitted through the ...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 韩璐王锐胡丽洁
Owner CHINA MOBILE COMM GRP CO LTD
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