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Pilot sending method, pilot receiving method and device thereof

A sending method and a technology for receiving values, applied in multi-frequency code systems, digital transmission systems, baseband system components, etc., can solve the problem of multi-path fading channels destroying the orthogonal characteristics of FBMC systems, and achieve the effect of saving time-frequency resources

Active Publication Date: 2021-04-02
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the MIMO-FBMC system with orthogonal conditions in the real number domain, the complex number characteristics of the multipath fading channel will destroy the orthogonality characteristics of the FBMC system, so the signal received by the receiving front end has inter-symbol interference and inter-subcarrier interference, and it is necessary to design a A pilot signal sequence and channel estimation method for MIMO-FBMC real-number domain orthogonality to eliminate inter-symbol interference and inter-subcarrier interference

Method used

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  • Pilot sending method, pilot receiving method and device thereof
  • Pilot sending method, pilot receiving method and device thereof
  • Pilot sending method, pilot receiving method and device thereof

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Embodiment 1

[0117]This embodiment assumes that the MIMO-FBMC system is a MIMO system having two transmit antennas and two receiving antennas. Take 4QAM modulation, the subcarrier size is m = 32, the channel tap number is L.h= 2, in order to achieve the same energy of the pilot sequence, the two lengths of the 2 lengths used to be p = 8 are:

[0118]

[0119]

[0120]The pilot structure takes the structure of Figure 3 (a), and the MIMO-FBMC system is in accordance withFigure 6 ~ 9 The transmission pilot is constructed in a manner.

[0121]Figure 6 A orthogonal sequence used in the present embodiment and the transmission antenna 2 is shown. First of allFigure 6 The orthogonal sequence is constructed according to the method of formula (6).Figure 7 The pilot time domain sequence shown;Figure 7 The sequence is obtained by FFT transformation according to the formula (7)Figure 8 The frequency domain real sequence shown;Figure 8 The sequence is placed in the pilot zone as a conventional lead, and the value of the ...

Embodiment 2

[0124]This embodiment assumes that the MIMO-FBMC system is a MIMO system having two transmit antennas and two receiving antennas. Take 16QAM modulation, the subcarrier size is m = 32, and the channel tap is L.h= 2, in order to achieve the same energy of the pilot sequence and the data energy, the two lengths of the two lengths of P = 8 have been taken from the ZCZ sequence as:

[0125]

[0126]

[0127]The pilot structure takes the structure of Figure 3 (b), and the MIMO-FBMC system is in accordance withFigure 10 ~ 13The transmission pilot is constructed in a manner.

[0128]Figure 10 A orthogonal sequence used in the present embodiment and the transmission antenna 2 is shown. First of allFigure 10 The orthogonal sequence is constructed according to the method of formula (6).Figure 11 The pilot time domain sequence shown;Figure 11 The sequence is obtained by FFT transformation according to formula (8)Figure 12 The frequency domain real sequence shown;Figure 12 The sequence is placed in the pilo...

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Abstract

The invention provides a pilot frequency transmission method which is applied to a MIMO-FBMC system. The method comprises the steps that A a time domain orthogonal sequence serving as pilot frequency is generated, and the length of the time domain orthogonal sequence is expanded to be equal to the sub-carrier length of the FBMC system; B the expanded time domain orthogonal sequence is transformed into a frequency domain sequence; and C values at odd-numbered locations of the frequency domain sequence are added to corresponding locations of a pilot frequency area for transmission, wherein steps A to C are carried out on each transmission antenna. The invention further provides a corresponding pilot frequency receiving method, a pilot frequency transmission device and a pilot frequency receiving device. According to the technical scheme provided by the invention, the accuracy of channel estimation of the MIMO-FBMC system can be improved, and the time-frequency resources of the MIMO-FBMC system can be saved.

Description

Technical field[0001]The present invention relates to the field of wireless communication technologies, and more particularly, to a pilot transmission method, a pilot receiving method, and apparatus for a multi-carrier system based on a filter set.Background technique[0002]In existing communication technologies, the filter set multi-carrier (FBMC) system is one of the main candidate technologies of future mobile multimedia communications with its higher spectral utilization, good time-frequency focus. Detailed detailed description (Lefloch, M.Alard, And C.berrou, "Coded Orthogonal Frequency Division Multiplex," Proceedings of The IEEE, VOL.83, PP.982-996, June 1995.).[0003]The mathematical expression of the transmitted signal S (T) of the FBMC system is:[0004][0005]Where: aM, N Represents data on the first M subcarrier of the nth transmit symbol, V0Τ0The FBMC system sub-carrier interval and transmit signal time interval, G (t) represent the forming filter function.[0006]Compared to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/02
CPCH04L25/0202H04L27/2691
Inventor 胡苏袁航喻斌孙鹏飞朱大琳
Owner BEIJING SAMSUNG TELECOM R&D CENT
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