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A method and device for generating a pilot sequence

A technology of pilot sequence and generation method, which is applied in the direction of transmission path separation device, pilot signal distribution, multi-frequency code system, etc., can solve problems such as unable to provide solutions, and achieve the effect of reducing influence and improving accuracy

Active Publication Date: 2015-08-12
ZTE CORP
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Problems solved by technology

[0041] Based on the above analysis, how to reduce the impact of inter-carrier interference on channel estimation, the existing technology can not provide an effective solution

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  • A method and device for generating a pilot sequence
  • A method and device for generating a pilot sequence
  • A method and device for generating a pilot sequence

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Embodiment Construction

[0085] The technical solutions of the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0086] A method for generating a pilot sequence provided by the present invention, such as Figure 5 As shown, it mainly includes the following steps:

[0087] Step 501, in each DMRS port that performs code division multiplexing, select an OCC from the OCC set according to different criteria for different code division and frequency division and / or time division multiplexing groups, and / or for different code division multiplexing groups Multiplexing groups generate DMRS scrambling sequences according to different criteria.

[0088] Among them, different CDM groups can be collected from OCC in reverse order [OCC 0 ,...,OCC k-1 ] to select an OCC, k represents the number of OCCs in the OCC set, and k is an integer greater than 1. The following is an example to illustrate: two code division multiplexing groups selec...

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Abstract

The present invention discloses a method for generating a pilot sequence. The method includes that: in each demodulation reference symbol (DMRS) port where hybrid multiplexing is performed, different code division multiplexing (CDM) groups select orthogonal cover codes (OCCs) from an orthogonal cover code set and / or generate scrambling sequences of the DMRS according to different rules,wherein the hybrid multiplexing can be hybrid multiplexing of code division, frequency division and time division, hybrid multiplexing of code division and frequency division, or hybrid multiplexing of code division and time division; the final pilot sequence for each DMRS port is generated by multiplying the selected OCC by the scrambling sequence. The present invention also discloses an apparatus for generating the pilot sequence. With the method and apparatus of the present invention, corresponding layers among different CDM port groups can be reduced, the influence of inter-carrier interference on channel estimation can be reduced, wherein the inter-carrier interference is caused by Doppler shift and timing error, and the precision of the channel estimation can also be improved.

Description

technical field [0001] The present invention relates to inter-carrier interference processing technology in the field of wireless communication, in particular to a method and device for generating a pilot sequence. Background technique [0002] The high-order multi-antenna technology is one of the key technologies of the Long Term Evolution Advanced (LTE-A, Long Term Evolution Advanced) system, and is used to increase the transmission rate of the system. In order to achieve channel quality measurement and data demodulation after the introduction of high-order multi-antenna technology, the LTE-A system defines two types of pilot symbols: data demodulation pilot (DMRS, Demodulation Reference Signal) and channel quality measurement pilot ( CSI-RS, Channel State Information-Reference Signal). Among them, DMRS is a reference symbol used for demodulation of Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel), referred to as demodulation reference symbol; CS...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L5/02
CPCH04L5/0016H04L5/0048H04L5/0007
Inventor 孙云锋张文峰姜静张峻峰
Owner ZTE CORP
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