Method and device for processing received signals

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...

Examples

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 ;

...

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...

Examples

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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