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Frequency bias estimation method for radio communication system uplink

A wireless communication system and frequency offset estimation technology, applied in the field of frequency synchronization and frequency offset estimation, can solve the problems of OFDM frequency offset sensitivity, small frequency offset estimation range, inability to eliminate shortcomings, etc., achieves small computational complexity and ensures synchronization accuracy , the effect of not increasing the burden of system resources

Inactive Publication Date: 2009-02-11
ZTE CORP
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, while OFDM technology has the above advantages, it cannot eliminate their own shortcomings: OFDM is very sensitive to frequency offset
But its disadvantage is that the correlation peak is relatively flat, which is not conducive to judgment, and the frequency offset estimation range is small

Method used

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  • Frequency bias estimation method for radio communication system uplink
  • Frequency bias estimation method for radio communication system uplink
  • Frequency bias estimation method for radio communication system uplink

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Embodiment Construction

[0023] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0024] figure 1 It is a flow chart showing the frequency offset estimation method used in the uplink of the wireless communication system according to the present invention. refer to figure 1 , a frequency offset estimation method used in the uplink of a wireless communication system, comprising the following steps: Step S102, the transmitting end constructs a reference symbol in the frame structure of the transmitting signal, and transmits the transmitting signal to the receiving end; Step S104, the receiving end After the received signal is time-synchronized, extract the reference symbol from the signal; step S106, compare the phase of the reference symbol from the transmitting end with the reference symbol extracted at the receiving end, and record the comparison result as a phase offset information value ; and Step S108 , determining the frequenc...

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Abstract

The invention provides a frequency deviation estimation method used in the uplink of a wireless communication system. The method comprises the following steps: step S102, a reference mark is constructed in the frame structure of a transmitted signal at the transmitting terminal, and the transmitted signal is transmitted to a receiving terminal; step S104, after time synchronization is conducted to the received signal, the receiving terminal extracts the reference mark from the signal; step S106, phase comparison is made between the reference mark from the transmitting terminal and the reference mark extracted at the receiving terminal, and the comparison result is recorded into a phase deviation information value; and step S108, the frequency deviation estimation value is determined according to the length of the reference mark of the transmitted signal and the phase deviation information value. While ensuring the synchronization precision, the method does not increase the resource burden of the system, and the operand is very small. Therefore, the method is favorable for projects to be realized.

Description

technical field [0001] The invention relates to a frequency offset estimation method applied in the uplink of an E-UTRA (Enhanced UTRA) wireless communication system and frequency synchronization according to the method. Background technique [0002] With the development of digital signal processing technology and high-speed devices, the initial obstacles to OFDM (Orthogonal Frequency Division Multiplexing, referred to as Orthogonal Frequency Division Multiplexing) technology no longer exist, and OFDM has been used in DAB (Digital Audio Broadcast, referred to as Digital Audio Broadcasting), DVB (Digital Video Broadcast, referred to as Digital Video Broadcasting) and WLAN (Wireless Local-area Network, referred to as Wireless Local Area Network) and other systems have been successfully applied. OFDM utilizes the orthogonality between sub-carriers, allows the spectrum of sub-channels to overlap each other, and can utilize spectrum resources to a great extent. It converts the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L5/02
Inventor 李斌冯波
Owner ZTE CORP