Method and device for processing received signals

A technology for receiving signals and processing methods, which is applied to the shaping network in the transmitter/receiver, baseband system components, multi-frequency code systems, etc. Problems such as large number of problems, to reduce the processing complexity

Active Publication Date: 2016-07-06
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] First, in the joint detection process of the prior art, for each received symbol in the frequency domain, it is necessary to construct an N*N frequency domain equalization matrix and perform an inverse operation for joint detection. When the amount of user uplink data is large, the When the number of subcarriers in the frequency domain occupied by the user is large, the processing complexity is high;
[0022] Second, when the UE is relatively close to a certain RRU and far away from other RRUs, the received Signal-to-Interference-and-NoiseRatio (SINR) on some RRU channels is low. Joint detection algorithm, on the contrary, will lead to a decrease in receiving performance

Method used

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  • Method and device for processing received signals
  • Method and device for processing received signals
  • Method and device for processing received signals

Examples

Experimental program
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Effect test

Embodiment 1

[0089]Step 1, start numbering from 0 for all receiving channels, record the total number of channels as N, and initialize the channel index n=0;

[0090] Step 2. On the receiving channel numbered n, perform the operations from step 2.1 to step 2.5 respectively:

[0091] Step 2.1, first perform operations such as removing cyclic prefix (CyclicPrefix, CP), OFDM demodulation, and removing 7.5KHz frequency offset on the received time domain signal;

[0092] Step 2.2, separate the pilot signal and user data signal from the signal obtained in step 2.1, use the pilot signal to perform channel estimation, and interpolate to obtain the user data signal r on the kth subcarrier n (k) Corresponding frequency domain channel response value H n (k);

[0093] Step 2.3, perform channel equalization processing according to the obtained frequency domain channel response value and user data signal, and obtain the frequency domain soft symbol s after channel equalization on the kth subcarrier n...

Embodiment 2

[0100] Such as Figure 3B As shown, without loss of generality, this embodiment assumes that the number of uplink transmit antennas of the UE is 1, that is, M=1; each RRU has only one receive antenna, which corresponds to one receive channel, and a BBU is connected to two antennas in total. RRU, that is, N=2.

[0101] Step 1, start numbering from 0 for all channels, record the total number of channels as N, and initialize the channel index n=0;

[0102] Step 2. On the receiving channel numbered n, perform the operations from step 2.1 to step 2.5 respectively:

[0103] Step 2.1, first perform operations such as de-CP, OFDM demodulation, and 7.5KHz frequency offset removal on the received time-domain signal;

[0104] Step 2.2, separate the pilot signal and user data signal from the signal obtained in step 2.1, use the pilot signal to perform channel estimation, and interpolate to obtain the user data signal r on the kth subcarrier n (k) Corresponding frequency domain channel ...

Embodiment 3

[0142] Step 1, start numbering from 0 for all receiving channels, record the total number of channels as N, and initialize the channel index n=0;

[0143] Step 2. On the receiving channel numbered n, perform the operations from step 2.1 to step 2.5 respectively:

[0144] Step 2.1, first perform operations such as removing the cyclic prefix (CP), OFDM demodulation, and removing the 7.5KHz frequency offset on the received time domain signal;

[0145] Step 2.2, separate the pilot signal and user data signal from the signal obtained in step 2.1, use the pilot signal to perform channel estimation, and interpolate to obtain the user data signal r on the kth subcarrier n (k) Corresponding frequency domain channel response value H n (k);

[0146] Step 2.3, perform channel equalization processing according to the obtained frequency domain channel response value and user data signal, and obtain the frequency domain soft symbol s after channel equalization on the kth subcarrier n ;

...

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Abstract

The invention discloses a received signal processing method and device and relates to the technical field of wireless communication. The received signal processing method and device is used for reducing processing complexity of received signals. In the received signal processing method and device, each receiving channel independently conducts OFDM demodulation, channel estimation, channel equilibrium processing, IDFT and soft demodulation processing on the received signals, then, merging processing is conducted on information obtained after the soft demodulation processing is conducted on the receiving channel, channel decoding is conducted on information obtained after the merging processing is conducted, and an information source bit stream is obtained. Compared with the prior art, the received signal processing method and device reduces the processing complexity of the received signals.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for processing received signals. Background technique [0002] There are some specific scenarios in the cellular wireless mobile communication network, such as: indoor and outdoor boundary areas; indoor coverage of different floors and areas; highways, railways, subways, blind spots under towers, etc. In these scenarios, when the terminal is moving rapidly, the signal fading changes quickly, and the reselection and handover bands are not easy to set. If the setting is not reasonable, it will easily lead to more signaling interactions, causing call drops and affecting customer perception. For the switching problem of these scenarios, the traditional implementation or optimization methods have certain defects. [0003] In view of the problems in the above traditional solutions, it is recommended to adopt distributed antenna technology (that is, cel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/02H04L25/03
Inventor 任斌周灏李琼
Owner DATANG MOBILE COMM EQUIP CO LTD
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