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A signal sending and receiving method and device

A signal transmission and signal technology, applied in the field of communication, can solve problems such as unfavorable channel estimation, large reference signal interference, and unsatisfactory

Active Publication Date: 2021-09-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Different cells can use different Gold sequences to generate reference signals, but when using the sequences generated based on the Gold sequences, especially when the length of the Gold sequences is large, the number of different Gold sequences far exceeds the requirement (for example, 30 in the NR system ), but the cross-correlation and autocorrelation characteristics of the Gold sequence will lead to greater interference between different reference signals, and the frequency flatness of the DMRS signal is poor, which is not conducive to channel estimation
[0004] That is to say, adopting the sequence used by the existing DMRS for PUSCH cannot meet the requirements of sending signals by using PUSCH or physical uplink control channel (physical uplink control channel, PUCCH) or sounding reference signal (sounding reference signal, SRS). communication application environment

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  • A signal sending and receiving method and device
  • A signal sending and receiving method and device
  • A signal sending and receiving method and device

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Embodiment Construction

[0187] In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

[0188] Hereinafter, some terms in the embodiments of the present application will be explained, so as to facilitate the understanding of those skilled in the art.

[0189] 1) Terminal devices, including devices that provide voice and / or data connectivity to the user, may for example include handheld devices with wireless connectivity, or processing devices connected to wireless modems. The terminal equipment may communicate with the core network via a radio access network (RAN), exchanging voice and / or data with the RAN. The terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile stat...

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Abstract

Provided are an information sending and receiving method and device. The terminal device generates the first signal according to the sequence {x(n)}, the sequence {x(n)} includes N elements, N is an integer greater than 1, and the sequence {x(n)} satisfies x(n) = A b(n) j n , the value of n is [0, N-1], the element b(n) satisfies b(n)=u·(1-2s(n)), A and u are both non-zero complex numbers, and the element s(n ) consists of a sequence {s(n)} that is one of the sequences in the first sequence set. A terminal device sends a first signal. By using the new sequence provided by the embodiment of this application, it is possible to maintain a good frequency domain flatness when using PUSCH or PUCCH to send signals, while maintaining a low PAPR value and low cross-correlation between signals, so as to meet the requirements of the application The communication application environment in which PUSCH or PUCCH sends signals.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular, to a method and apparatus for transmitting and receiving signals. Background technique [0002] In a long term evolution (long term evolution, LTE) system, the demodulation of a physical uplink shared channel (PUSCH) uses an uplink demodulation reference signal (demodulation reference signal, DMRS) to perform channel estimation. The sequence of uplink DMRS is directly mapped to frequency domain subcarriers. The uplink DMRS sequence is a sequence generated by the cyclic shift of the base sequence in the time domain, and the base sequence is obtained by cyclic expansion of the Zadoff-Chu sequence (ZC sequence). The ZC sequence is a sequence that satisfies the property of constant amplitude zero auto-correlation (CAZAC) sequence. The peak-to-average power ratio (PAPR) of the DMRS signal is low, and the cross-correlation of different DMRS sequences allocated to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00
CPCH04L5/0048H04L5/0058H04L5/00
Inventor 曲秉玉龚名新周永行
Owner HUAWEI TECH CO LTD