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Symbol data sending and receiving method, storage medium, sending end equipment and receiving end equipment

A technology of symbol data and transmission method, applied in the field of communication, can solve problems such as multiple computing resources, and achieve the effect of ensuring convenience and reducing computing complexity

Active Publication Date: 2020-06-16
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, in the prior art, since the transmitting end only knows the carrier frequency of the transmitting end, and the receiving end only knows the carrier frequency of the receiving end, it is necessary to perform phase compensation for each OFDM symbol data at the transmitting end and the receiving end.
When the sampling rate of symbol data is high, phase compensation requires more computing resources

Method used

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  • Symbol data sending and receiving method, storage medium, sending end equipment and receiving end equipment
  • Symbol data sending and receiving method, storage medium, sending end equipment and receiving end equipment
  • Symbol data sending and receiving method, storage medium, sending end equipment and receiving end equipment

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Embodiment Construction

[0036] For the phase compensation scheme in the prior art, the following relationship is mainly used: k·Δ f +f TX =(k+M)·Δ f +f RX ,in Δf is the subcarrier spacing, k is the number of subcarriers, and M is the carrier offset. Combine phase difference terms for each symbol data:

[0037]

[0038] Compensate separately at the sender and receiver:

[0039]

[0040]

[0041]

[0042] in, Compensate the phase for the transmitter, Compensate the phase for the receiver.

[0043] As mentioned in the background technology, in the prior art, since the transmitting end only knows the carrier frequency of the transmitting end, and the receiving end only knows the carrier frequency of the receiving end, phase compensation needs to be performed on each OFDM symbol data at the transmitting end and the receiving end. When the sampling rate of symbol data is high, phase compensation requires more computing resources.

[0044] In the embodiment of the present invention, f...

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Abstract

The invention discloses a symbol data sending and receiving method, a storage medium, sending end equipment and receiving end equipment, and the symbol data sending method comprises the steps: carrying out the extension of original data corresponding to each piece of symbol data in a baseband in a time domain from the start position of a time slot; for each expanded original data, performing backward cyclic shift on the current original data according to the length of the cyclic prefix of the current symbol data corresponding to the current original data and the lengths of the cyclic prefixesof all symbol data before the current symbol data in the time slot; taking each piece of original data after cyclic shift as a data part of the corresponding symbol data; for each symbol data, copyingthe data from the tail of the data part of the symbol data according to the length of the cyclic prefix of the symbol data to serve as the cyclic prefix of the symbol data; and sending out each symbol data. According to the technical scheme, the transmission efficiency of the symbol data can be improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for sending and receiving symbolic data, a storage medium, a sending end device, and a receiving end device. Background technique [0002] In the new radio (New Radio, NR) system, for the baseband signal modulated by Orthogonal Frequency Division Multiplexing (OFDM), if the carrier frequency of the sending end and the receiving end are inconsistent, when the receiving end obtains the frequency domain data , compared with the frequency domain data sent by the sending end, there will be a fixed phase difference, and the phase differences of different symbol data (symbol) are different. [0003] Taking the OFDM modulation process of a certain carrier as an illustration, assuming that the sending end needs to carry data a on carrier k, according to the definition of the NR standard 3gpp38.211 standard document, the expression of the carrier in the time domain ...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L27/26
CPCH04L5/0007H04L5/0048H04L27/2613Y02D30/70
Inventor 茆晓军
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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