Signal sending method and device and signal 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: 2020-03-06
HUAWEI TECH CO LTD
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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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[0187] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.
[0188] In the following, some terms used in the embodiments of the present application are explained, so as to facilitate the understanding of those skilled in the art.
[0189] 1) Terminal equipment, including equipment that provides voice and / or data connectivity to users, for example, it may include a handheld device with wireless connection function, or a processing device connected to a wireless modem. The terminal device can communicate with the core network via a radio access network (radio access network, RAN), and exchange voice and / or data with the RAN. The terminal equipment may include user equipment (user equipment, UE), wireless terminal equipment, mobile terminal equipment, subscriber unit (subscriber unit...
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The invention provides a signal sending method and device and a signal receiving method and device. The terminal equipment generates a first signal according to the sequence {x (n)}, wherein the sequence {x (n)} comprises N elements, N is an integer greater than 1, the sequence {x (n)} satisfies x (n) = A * b (n) * jn, the value of n is [0, N-1], the element b (n) satisfies b (n) = u * (1-2s (n)),A and u are non-zero complex numbers, and the sequence {s (n)} formed by the element s (n) is one of the sequences in the first sequence set. The terminal equipment sends a first signal. By using thenew sequence provided by the embodiment of the invention, better frequency domain flatness can be maintained when the PUSCH or PUCCH is used for sending the signal, and meanwhile, a lower PAPR valueand lower inter-signal cross correlation are maintained, so that a communication application environment for sending the signal by using the PUSCH or PUCCH is satisfied.
Description
technical field [0001] The present application relates to the technical field of communications, and in particular to a signal sending and receiving method and device. Background technique [0002] In a long term evolution (long term evolution, LTE) system, demodulation of a physical uplink shared channel (PUSCH) uses an uplink demodulation reference signal (demodulation reference signal, DMRS) for channel estimation. The sequence of the uplink DMRS is directly mapped to the frequency domain subcarrier. The uplink DMRS sequence is a sequence generated by the time-domain cyclic shift of the base sequence, and the base sequence is obtained by cyclic expansion of the Zadoff-Chu sequence (ZC sequence). The ZC sequence is a sequence satisfying the constant envelope zero autocorrelation (constant amplitude zero auto-correlation, CAZAC) sequence property. The peak-to-average power ratio (PAPR) of the DMRS signal is low, and the different DMRS sequences allocated by different cell...
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IPC IPC(8): H04L5/00
CPCH04L5/0048H04L5/0058H04L5/00
Inventor 曲秉玉龚名新周永行
Owner HUAWEI TECH CO LTD