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Method and apparatus for cyclic shifting of comb pilots

A comb-shaped pilot and user equipment technology, which is applied in the direction of pilot signal distribution, multiple use of transmission paths, separation devices of transmission paths, etc., can solve the problem that the D2D communication cyclic shift scheme cannot be directly applied, is not optimized enough, and the wireless channel Frequency selectivity is easy to destroy the sequence orthogonality of different cyclic shifts and other issues

Active Publication Date: 2020-11-03
ALCATEL LUCENT SHANGHAI BELL CO LTD +1
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  • Description
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Problems solved by technology

[0004] The cyclic shift scheme in traditional D2D communication cannot be directly applied to comb-shaped DMRS-based V2V communication, and the traditional cyclic shift scheme is not optimized enough, and the frequency selectivity of the wireless channel is relatively easy to destroy the relationship between sequences of different cyclic shifts. Orthogonality

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  • Method and apparatus for cyclic shifting of comb pilots
  • Method and apparatus for cyclic shifting of comb pilots
  • Method and apparatus for cyclic shifting of comb pilots

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Embodiment Construction

[0019] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0020] As used herein, the term "comprise" and its variants mean open inclusion, ie "including but not limited to". The term "or" means "and / or" unless otherwise stated. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment." The term "another embodiment" means "at least one further embodiment". The terms "first", "second", etc. may refer to di...

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Abstract

Embodiments of the invention relate to a cyclic shift method used for a comb-type pilot frequency and equipment thereof. The method comprises the following steps of receiving a cyclic shift set indication used for vehicle-mounted user equipment from a base station; responding to the indication which is a first indication, and selecting a first cyclic shift set used for a pilot frequency signal, wherein the first cyclic shift set is associated with one physical resource block; and responding to the indication which is a second indication, and selecting a second cyclic shift set used for the pilot frequency signal, wherein the second cyclic shift set is associated with at least two physical resource blocks. In the embodiments of the invention, through setting the two cyclic shift sets, selection is performed on the two cyclic shift sets so that the cyclic shift aiming at the comb-type pilot frequency can be realized.

Description

technical field [0001] Embodiments of the present disclosure relate to the field of wireless communication, and more particularly, to a method and device for cyclic shifting of comb pilots. Background technique [0002] Vehicle-to-vehicle (Vehicle-to-Vehicle, V2V) communication refers to data transmission between vehicles, that is, adjacent vehicles directly establish a communication link, so that vehicles can communicate, share information within the group, and send alarms. V2V communication has the characteristics of high speed and large frequency deviation. [0003] Comb pilot refers to inserting a pilot signal every two subcarriers at equal intervals in the pilot OFDM symbol in the Physical Resource Block (Physical Resource Block, PRB), for example, only even-numbered bits in the PRB Subcarriers are used to carry pilot signals. The comb pilot may be a demodulation reference signal (Demodulation Reference Signal, DMRS). Comb-shaped DMRS is used in V2V communication, so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0007H04L5/0048
Inventor 李栋刘勇T·维尔德斯彻克
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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