Method and device for sending reference signal, and method and device for receiving reference signal

Abstract

The application provides a method for sending a reference signal and a device for sending a signal. The method for sending the reference signal includes the following steps: generating a first reference signal according to a data signal, an interference relationship between adjacent carrier waves, and a predefined second reference signal; modulating and sending the data signal and the first reference signal on corresponding carrier by utilization of a non-orthogonal multi-carrier modulation waveform. The application also discloses a method for receiving the reference signal and a device for receiving the signal. According to the application, the utilization rate of carrier resources can be improved, and the interference on the reference signal can be reduced, so that the better channel estimation and synchronization performance can be provided.

Description

technical field

[0001] The present application relates to the technical field of wireless communication, and in particular to a method for sending a reference signal, a signal sending device, a method for receiving a reference signal, and a signal receiving device applicable to a non-orthogonal multi-carrier wireless communication system. Background technique

[0002] With the rapid development of the information industry, the future wireless communication technology is facing unprecedented challenges. In the foreseeable future, the global demand for wireless data services will maintain high-speed growth. According to the ITU report, by 2020, wireless data services will increase by at least 1000 times. In some countries and regions, this number may be higher. In order to meet this unprecedented challenge, extensive 5G communication technology research has been carried out all over the world.

[0003] Among various potential technologies that can enhance spectrum efficienc...

Examples

Embodiment 1

[0097] In traditional wireless communication systems, Orthogonal Frequency Division Multiplexing (OFDM) has been widely used due to its simple implementation, ability to resist multipath fading, and high spectrum efficiency. For example, the third generation mobile communication partnership project ( The Long Term Evolution (LTE: Long Term Evolution) system corresponding to the Evolved Universal Terrestrial Radio Access (E-UTRA) protocol formulated by 3GPP: 3rd Generation Partnership Project). However, with the challenges of future mobile communications, some new non-orthogonal multi-carrier waveforms have gained more and more attention. Among them, filter bank based multi-carrier (FBMC) brings new possibilities for future wireless communication due to its highly time-frequency focused waveform. For example, FBMC uses a shaping filter to perform pulse shaping on the signal of each subcarrier, which enables FBMC to obtain good reception robustness under higher time-frequency er...

Embodiment 2

[0175] This embodiment describes how to apply the adjacent paired reference signal method to a wireless transmission system based on a frame structure, and this embodiment also describes how to implement multi-antenna channel estimation in an FBMC system.

[0176] Figure 4 It is a demodulation reference signal (DMRS: DemodulationReferenceSignal) pattern in an LTE system, wherein each frame includes 14 OFDM symbols, two antenna ports R7 and R8 use the same time-frequency resource, and pass the orthogonal code [1,1 ] and [1,-1] to distinguish.

[0177] Assuming that a system using FBMC waveforms uses the same frame structure and also needs to provide two orthogonal ports for channel estimation, the frame structure and reference signal patterns used can be Figure 5 and Figure 6 Two examples are shown. in, Figure 5 The reference signal pattern shown is a continuous reference signal pattern in time domain; Figure 6 The reference signal patterns shown are continuous refere...

Embodiment 3

[0196] This embodiment describes how to apply the adjacent paired reference signal method to synchronization pilots. In a communication system, initial time-frequency synchronization needs to be completed through a dedicated pilot sequence, for example, the initial synchronization of LTE is completed through a PSS / SSS sequence. Since LTE uses OFDM modulation, this allows PSS / SSS sequences to be easily interleaved into the data channel while avoiding any interference. If a system uses FBMC modulation, the synchronization sequence similar to PSS / SSS will be interfered by data signals on adjacent carriers, such as ( Figure 9 shown). Different from channel estimation, since the receiver has not obtained time and frequency synchronization information when receiving the synchronization pilot sequence, the receiver cannot obtain the pilot sequence in the frequency domain, and thus the receiver cannot predict the frequency domain signal as in the first embodiment. deal with. There...

technical field

[0001] The present application relates to the technical field of wireless communication, and in particular to a method for sending a reference signal, a signal sending device, a method for receiving a reference signal, and a signal receiving device applicable to a non-orthogonal multi-carrier wireless communication system. Background technique

[0002] With the rapid development of the information industry, the future wireless communication technology is facing unprecedented challenges. In the foreseeable future, the global demand for wireless data services will maintain high-speed growth. According to the ITU report, by 2020, wireless data services will increase by at least 1000 times. In some countries and regions, this number may be higher. In order to meet this unprecedented challenge, extensive 5G communication technology research has been carried out all over the world.

[0003] Among various potential technologies that can enhance spectrum efficienc...

Examples

Embodiment 1

[0097] In traditional wireless communication systems, Orthogonal Frequency Division Multiplexing (OFDM) has been widely used due to its simple implementation, ability to resist multipath fading, and high spectrum efficiency. For example, the third generation mobile communication partnership project ( The Long Term Evolution (LTE: Long Term Evolution) system corresponding to the Evolved Universal Terrestrial Radio Access (E-UTRA) protocol formulated by 3GPP: 3rd Generation Partnership Project). However, with the challenges of future mobile communications, some new non-orthogonal multi-carrier waveforms have gained more and more attention. Among them, filter bank based multi-carrier (FBMC) brings new possibilities for future wireless communication due to its highly time-frequency focused waveform. For example, FBMC uses a shaping filter to perform pulse shaping on the signal of each subcarrier, which enables FBMC to obtain good reception robustness under higher time-frequency er...

Embodiment 2

[0175] This embodiment describes how to apply the adjacent paired reference signal method to a wireless transmission system based on a frame structure, and this embodiment also describes how to implement multi-antenna channel estimation in an FBMC system.

[0176] Figure 4 It is a demodulation reference signal (DMRS: DemodulationReferenceSignal) pattern in an LTE system, wherein each frame includes 14 OFDM symbols, two antenna ports R7 and R8 use the same time-frequency resource, and pass the orthogonal code [1,1 ] and [1,-1] to distinguish.

[0177] Assuming that a system using FBMC waveforms uses the same frame structure and also needs to provide two orthogonal ports for channel estimation, the frame structure and reference signal patterns used can be Figure 5 and Figure 6 Two examples are shown. in, Figure 5 The reference signal pattern shown is a continuous reference signal pattern in time domain; Figure 6 The reference signal patterns shown are continuous refere...

Embodiment 3

[0196] This embodiment describes how to apply the adjacent paired reference signal method to synchronization pilots. In a communication system, initial time-frequency synchronization needs to be completed through a dedicated pilot sequence, for example, the initial synchronization of LTE is completed through a PSS / SSS sequence. Since LTE uses OFDM modulation, this allows PSS / SSS sequences to be easily interleaved into the data channel while avoiding any interference. If a system uses FBMC modulation, the synchronization sequence similar to PSS / SSS will be interfered by data signals on adjacent carriers, such as ( Figure 9 shown). Different from channel estimation, since the receiver has not obtained time and frequency synchronization information when receiving the synchronization pilot sequence, the receiver cannot obtain the pilot sequence in the frequency domain, and thus the receiver cannot predict the frequency domain signal as in the first embodiment. deal with. There...

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