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Method and device for performing frequency domain average processing on dmrs symbols in ofdm symbols

An average processing and symbol technology, which is applied to the shaping network, multi-frequency code system, baseband system components, etc. Effect

Active Publication Date: 2017-12-19
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Second, linear phase inverse rotation needs to generate a compensation coefficient table for each system bandwidth (Bandwidth, BW) and time offset, namely in, Because of the need to utilize the sin and cos functions many times, it is computationally intensive

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  • Method and device for performing frequency domain average processing on dmrs symbols in ofdm symbols
  • Method and device for performing frequency domain average processing on dmrs symbols in ofdm symbols
  • Method and device for performing frequency domain average processing on dmrs symbols in ofdm symbols

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Embodiment Construction

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0029] figure 1 A schematic diagram of a compensation device for performing frequency-domain average processing on DMRS symbols in OFDM symbols according to one aspect of the present invention; wherein, the compensation device includes a compensation acquisition unit 11, a sequence acquisition unit 12, a compensation unit 13, Average unit 14. Specifically, the compensation obtaining unit 11 obtains the time offset compensation information corresponding to the DMRS symbol corresponding to the OFDM symbol; the sequence obtaining unit 12 obtains the frequency domain sequence corresponding to the DMRS symbol; the compensation unit 13 obtains the time offset compensation information according to the time offset compensation information , performing time offset compensation processing on the frequency domain sequence; the averaging unit 14 performs averaging proce...

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Abstract

The object of the present invention is to provide a method and device for performing frequency-domain average processing on DMRS symbols in OFDM symbols. The compensation device performs time offset compensation on the frequency domain sequence according to the time offset compensation information by acquiring the time offset compensation information corresponding to the DMRS symbol corresponding to the OFDM symbol and the frequency domain sequence corresponding to the DMRS symbol processing, and then performing averaging processing on the frequency domain sequence subjected to time offset compensation processing, so as to obtain a frequency domain averaging result corresponding to the DMRS symbol. Compared with the prior art, the present invention realizes the time offset compensation for the uplink channel by first compensating and then averaging the frequency domain sequences of a certain length corresponding to the DMRS symbols, and reduces the calculation required for compensation amount, and reduce the storage amount required for storing the time offset compensation information, thereby realizing the time offset compensation.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a technique for performing frequency-domain average processing on DMRS symbols in OFDM symbols. Background technique [0002] The LTE system uses a cyclic prefix (CP, Cyclic Prefix) to avoid inter-symbol interference (ISI, Inter-Symbol Interference) caused by multipath. In order to make most of the multipath components fall within the range of the cyclic prefix, the center of gravity of the multipath components of the wireless channel is near the center of the cyclic prefix most of the time, so the signals received by the evolved base station (evolvedNode B, eNodeB) carry has a non-zero time offset. The existing time offset will lead to inaccurate measurement values ​​such as channel estimation, noise estimation, and velocity estimation. Therefore, in order to improve the performance of the eNodeB, it is necessary to perform time offset compensation in the uplink receiving...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03
Inventor 许张生曹伟沈皓徐晓景蒋智宁陈凤
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD