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A pilot pattern design method for full duplex ofdm communication system

A pilot pattern and communication system technology, applied in the transmission system, multi-frequency code system, digital transmission system, etc., can solve the problem of less research and achieve the effect of low complexity

Active Publication Date: 2021-09-07
CHENGDU UNIV OF INFORMATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For pilot pattern design, there are few researches at present

Method used

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  • A pilot pattern design method for full duplex ofdm communication system
  • A pilot pattern design method for full duplex ofdm communication system
  • A pilot pattern design method for full duplex ofdm communication system

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Experimental program
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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings, and the validity of the solution of the present invention will be illustrated in conjunction with simulation examples.

[0021] Such as figure 2 As shown, it is a full-duplex system model diagram, node A is a local terminal, node B is a remote terminal, set on node A, the signal to be transmitted after OFDM modulation is

[0022]

[0023] where S m (k) is the signal on the kth subcarrier of the mth OFDM symbol. After DAC conversion, the signal is

[0024] a(t)=s(t)+w(t) (0.2)

[0025] where w(t) is the quantization noise, and the signal after up-conversion processing is

[0026]

[0027] where f c is the carrier frequency and φ(t) is the phase noise. Using the Hammerstein model, the output signal after the power amplifier is

[0028] c'(t)=(α 1 b(t)+α 3 b(t)|b(t)| 2 )*g(t)=c(t)*g(t) (0.4)

[0029] where α 1 is the linear gain, α 3 is the third-order...

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Abstract

The invention belongs to the technical field of wireless communication, and in particular relates to a pilot pattern design method of a full-duplex OFDM communication system. The method of the present invention mainly inserts pilot data into OFDM symbols in an equal-spaced manner, and then selects subcarriers to carry pilot data in an equal-spaced manner in the selected OFDM symbols inserted with pilots, and in the same OFDM In the symbol, pilot non-zero data and pilot 0 data are alternately distributed. The method of the present invention is not only applicable to full-duplex static channels and slow-changing channels, but also to fast-changing channels, and the implementation complexity is lower.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a pilot pattern design method of a full-duplex OFDM communication system. Background technique [0002] With the rapid development of the mobile Internet, wireless communication has changed from low-speed text and voice transmission services to high-speed digital multimedia transmission services. The demand for mobile communication capacity is increasing explosively, and in stark contrast, the available wireless spectrum resources are becoming increasingly tight. Therefore, how to further improve the utilization efficiency of spectrum resources has attracted more and more attention of researchers. [0003] Time division duplex realizes the distinction between uplink and downlink through the division of time slots, while frequency division duplex realizes the distinction between uplink and downlink through the division of frequency bands. The tradition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L27/26H04L25/02
CPCH04L5/0008H04L5/0048H04L25/0202H04L27/261
Inventor 周娟沈莹陈超李蠡薛雅娟
Owner CHENGDU UNIV OF INFORMATION TECH