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Pilot frequency transmission method, pilot frequency receiving method and devices thereof

A technology for sending methods and receiving values, applied in the field of pilot receiving methods and devices, capable of solving problems such as multipath fading channels destroying the orthogonality characteristics of FBMC systems, and achieving the effect of saving time-frequency resources

Active Publication Date: 2017-01-18
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 frequency transmission method, pilot frequency receiving method and devices thereof
  • Pilot frequency transmission method, pilot frequency receiving method and devices thereof
  • Pilot frequency transmission method, pilot frequency receiving method and devices thereof

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Embodiment 1

[0117] This embodiment assumes that the MIMO-FBMC system is a MIMO system with 2 transmit antennas and 2 receive antennas, adopts 4QAM modulation, the subcarrier size is M=32, and the number of channel taps is L h =2, in order to achieve the same pilot sequence energy as the data energy, the two normalized ZCZ sequences with a length of P=8 are:

[0118] c 1 = [ - 1 , 1 , 1 , - 1 , 1 , 1 , - 1 , - 1 ] T / M

[0119] c 2 = [ - 1 , - 1 , 1 , 1 , ...

Embodiment 2

[0124] This embodiment assumes that the MIMO-FBMC system is a MIMO system with 2 transmit antennas and 2 receive antennas, adopts 16QAM modulation, the subcarrier size is M=32, and the number of channel taps is L h = 2, in order to achieve the same pilot sequence energy as the data energy, the two normalized ZCZ sequences with a length of P=8 are:

[0125] c 1 = [ 1 , 0.923 - 0.382 , - 1 i , - 0.923 + 0.382 , 1 , - 0.923 + 0.382 , - 1 i , 0.923 - 0.382 ] T / M

[0126] c 2 ...

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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 technical field of wireless communication, and more specifically, to a pilot sending method, a pilot receiving method and a device for a multi-carrier system based on a filter bank. Background technique [0002] Among the existing communication technologies, the filter bank multi-carrier (FBMC) system has become one of the main candidate technologies for future mobile multimedia communication due to its high spectrum efficiency and good time-frequency focusing characteristics. Its detailed introduction can be found in (Le Floch, 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 sending signal s(t) of the FBMC system is: [0004] s ( t ) = ...

Claims

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Application Information

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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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