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Signal transmitting method, signal receiving method and device

A receiving method and signal technology, applied in the field of communication, can solve problems such as few UEs

Active Publication Date: 2018-08-03
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a method for transmitting signals, a method for receiving signals, and equipment, which solves the problem of frequency deviation between the center frequency of signals received by the UE and the center frequency of signals transmitted by the base station compared with the subcarriers used for communication between the base station and the UE When the interval is relatively large, the number of UEs that support orthogonal code division multiplexing through cyclic shift is small

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  • Signal transmitting method, signal receiving method and device
  • Signal transmitting method, signal receiving method and device
  • Signal transmitting method, signal receiving method and device

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Embodiment Construction

[0111] The base station can assign the same root index of the ZC sequence to different UEs, and at the same time assign the root index satisfying l 1 mod N≠l 2 The cyclic shift value mod N (l 1 , l 2 ), to achieve the purpose of multiplexing multiple UEs on the same time-frequency domain resource. However, in an actual application scenario, there will be a frequency deviation between the center frequency of the signal received by the UE and the center frequency of the signal transmitted by the base station. When a long cyclic prefix (Cyclic Prefix, CP) is used and a small subcarrier spacing is used), the frequency deviation will be relatively large compared with the subcarrier spacing used by the base station and the UE for communication. The sequence obtained by the index has an additional cyclic shift in the time domain, therefore, the base station needs to reserve more cyclic shift values ​​for the UE.

[0112] For example, the root index assigned by the base station ...

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Abstract

The embodiment of the invention discloses a signal receiving method, a signal transmitting method and a device, relates to the field of communication and solves the problem that the UE supporting cyclic shift orthogonal code division multiplexing is small in number when a frequency deviation between a central frequency of a UE received signal and a central frequency of a base station transmittingsignal is relatively bigger than a sub-carrier spacing used for communication between a base station and UE. The specific scheme comprises the steps of determining a target root index from a sequenceindex set by the base station, wherein the sequence index set is {A1, B1, A2, B2, ..., As, Bs}, Ai=i(mod K), Bi=-i(mod K), Ai and Bi are root indexes of a ZC sequence, I is an integer greater than orequal to 1 but less than or equal to s, s is an integer greater than or equal to 1 but less than or equal to [K / 2]-1, [] represents to round in a floor manner, and K is the length of the ZC sequence;generating a signal sequence based on the target root indexes by the base station; receiving an uplink signal by the base station; and processing the uplink signal based on the signal sequence by thebase station. The embodiment of the invention is used in a signal transmission process.

Description

technical field [0001] Embodiments of the present invention relate to the communication field, and in particular, to a signal transmitting method, receiving method and equipment. Background technique [0002] In a wireless communication system, a user equipment (User Equipment, UE) sends a pilot sequence to a base station, and the base station can obtain the channel state information of the UE by detecting the pilot sequence, and use the channel state information to transmit data to the UE. to test. The ZC (Zadoff-Chu) sequence is a sequence with constant magnitude and zero autocorrelation. The sequence generated by the ZC sequence is modulated in the frequency domain, and then after the inverse discrete Fourier transform (Inverse Discrete Fourier Transform, IDFT), the sequence obtained in the time domain has a lower peak-to-average ratio (Peak average power ratio, PAPR ). Therefore, compared to using a sequence with a higher peak-to-average ratio, using the sequence gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J13/00H04J13/12H04L5/00
CPCH04J13/0007H04J13/0074H04J13/12H04L5/0044H04L5/0048H04L5/0082H04J13/00H04L5/00H04J13/0062H04J11/00H04J13/004H04J13/16H04J2011/0006H04J2013/165
Inventor 曲秉玉李雪茹
Owner HUAWEI TECH CO LTD
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