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Method and device for generating pilot frequency 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: 2011-09-28
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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  • Method and device for generating pilot frequency sequence
  • Method and device for generating pilot frequency sequence
  • Method and device for generating pilot frequency 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 invention discloses a method for generating a pilot frequency sequence. The method comprises the following steps of: selecting OCCs (Orthogonal Cover Code) from an OCC set according to different rules in each code division and frequency division and / or time division hybrid multiplexing demodulation reference signal (DMRS) port by using different code division multiplexing groups and / or generating scrambling sequences of the DMRS according to different rules by using different code division multiplexing groups; and multiplying the selected OCCs with the scrambling sequences to generate a final pilot frequency sequence of each DMRS port. The invention further discloses a device for generating a pilot frequency sequence. By adopting the method and the device, corresponding layers among different code division multiplexing port groups can be lowered, the influence of inter-carrier interference caused by the problems of Doppler frequency shift and timing error on channel estimation is reduced, and the channel estimation accuracy is increased.

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