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Information processing device, network node and information processing method

An information processing device and a technology for processing results, applied in the field of communication, can solve the problems of increasing the total time of IFFT modules, increasing the number of processing times, reducing system operating efficiency, etc.

Active Publication Date: 2019-09-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in the LSM system, the number of antennas increases sharply, so the number of IFFT processing required will also increase sharply, requiring the use of a large number of hardware resources, or increasing the total running time of the IFFT module, thereby reducing the operating efficiency of the system

Method used

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  • Information processing device, network node and information processing method
  • Information processing device, network node and information processing method
  • Information processing device, network node and information processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0065] In Embodiment A, the precoding module may perform precoding processing on the N time-domain data streams through a precoding matrix to obtain effective parts of OFDM symbols that need to be transmitted on each antenna.

[0066] For example, if figure 2 As shown, in the figure 2 In , assuming that there are 3 data streams, by encoding and modulating the 3 data streams respectively, 3 frequency domain data streams are obtained, namely frequency domain data stream 1, frequency domain data stream 2 and frequency domain data stream 3, where frequency Domain data stream 1, frequency domain data stream 2 and frequency domain data stream 3 are carried on the same sub-band; IFFT sub-module 1, IFFT sub-module 2 and IFFT sub-module 3 respectively 2 and frequency domain data stream 3 are respectively subjected to IFFT processing; then, the time domain data stream obtained from frequency domain data stream 1, the time domain data stream obtained from frequency domain data stream ...

Embodiment B

[0079] In embodiment B, N frequency-domain data streams and N time-domain data streams can be carried on S subbands, S is a positive integer greater than or equal to 2, and N is a positive integer greater than or equal to 2, wherein one frequency domain The data stream and the time domain data stream obtained based on the one frequency domain data stream are carried on one subband, which means that each subband in the S subbands carries different frequency domain data streams and Different time-domain data streams among the N time-domain data streams, for example, frequency-domain data stream 1, frequency-domain data stream 2, and time-domain data stream 1 and time-domain data stream based on frequency-domain data stream 1 and frequency-domain data stream 2 Data stream 2 is carried on subband 1, frequency domain data stream 3, frequency domain data stream 4, and time domain data stream 3 and time domain data stream 4 obtained based on frequency domain data stream 3 and frequenc...

Embodiment C

[0113] In embodiment C, the N time-domain data streams can be precoded by using a precoding matrix to obtain the effective part of the OFDM symbol that needs to be sent on each antenna.

[0114] Specifically, the following will describe in detail in combination with specific embodiments. In this embodiment, it is assumed that the device has 500 antennas in total, and for a certain subframe, 8 data streams are transmitted in total. The OFDM system has a total of 500 subcarriers, uses the same precoding matrix P, and the length of the IFFT is 512. The device 100 can perform the following steps:

[0115] Step 1: Obtain the frequency domain data streams corresponding to the 8 data streams:

[0116] Perform independent coding and modulation on the 8 data streams to generate corresponding frequency domain data x n (k), wherein, n is the serial number of the stream number (n=1, 2, ..., 8), and k is the serial number of the data symbol of the frequency domain data stream (k = 1, 2....

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Abstract

Embodiments of the present invention provide an information processing device, a network node, and an information processing method. The information processing device may include an inverse fast Fourier transform IFFT module, a precoding module, and a determination module; wherein, the IFFT module is used to perform IFFT processing on N frequency domain data streams to obtain N time domain data streams, and the N is a positive integer; the precoding module is used to perform precoding processing on the N time-domain data streams to obtain precoding processing results; the determining module is used to determine the need in M ​​according to the precoding processing results Orthogonal frequency division multiplexing OFDM symbols sent on each of the M antennas, so that the information transmission device transmits the OFDM symbols that need to be sent on each of the M antennas through each of the M antennas, wherein, The M is a positive integer greater than the N. The embodiments of the present invention can reduce hardware resource consumption or improve system operation efficiency.

Description

technical field [0001] The present invention relates to the communication field, and more specifically, relates to an information processing device, a network node and an information processing method. Background technique [0002] An Orthogonal Frequency Division Multiplexing (OFDM) system is widely used in existing wireless communication systems due to its good anti-fading performance. The time-domain signal of the OFDM system is generated through an Inverse Fast Fourier Transform (IFFT) operation. Multiple-Input Multiple-Output (MIMO) technology is also a commonly used technology in modern wireless communication because it can significantly improve channel capacity. Many existing communication systems adopt OFDM and MIMO at the same time, such as Long Term Evolution (Long Term Evolution, LTE), 802.11 and so on. In this case, for the transmission of data streams, the general implementation method is as follows: firstly perform precoding processing on each coded and modul...

Claims

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Application Information

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IPC IPC(8): H04B7/06
CPCH04B7/0456H04B7/068H04L27/2634
Inventor 王磊吴晔乔德礼
Owner HUAWEI TECH CO LTD