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Method and device for reducing public phase error

A common phase error and phase error technology, applied in the field of receiving equipment, can solve the problems of common phase error deviation, etc., and achieve the effect of reducing bit error rate and accurate estimation

Inactive Publication Date: 2009-12-02
TAIDING MEDIA SHANGHAI
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  • Abstract
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Problems solved by technology

However, the environment of wireless transmission is very harsh, and both continuous pilot and TPS may

Method used

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  • Method and device for reducing public phase error
  • Method and device for reducing public phase error
  • Method and device for reducing public phase error

Examples

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Embodiment Construction

[0030] image 3 A flow chart of a method for reducing the common phase error of received modulation symbols carried by multiple carriers in a receiving device of a multi-carrier communication network according to a specific embodiment of the present invention is shown.

[0031] First, in step S31, the receiving device determines estimated values ​​of phase errors of one or more modulation symbols to obtain one or more estimated values ​​of phase errors.

[0032] It should be noted that the modulation symbols mentioned here refer to modulation symbols obtained by modulation after channel coding, such as QAM modulation symbols or QPSK modulation symbols. The phase error of the modulation symbol refers to the difference between the phase before the modulation symbol decision (hard decision or soft decision) and the phase after the decision. For example, it may be the difference between the phase after modulation symbol equalization processing and the phase after hard decision, o...

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Abstract

The invention provides a novel method for reducing a public phase error of modulation signs received by receiving equipment and carried by a plurality of carrier waves, which comprises the following step: carrying out public phase compensation on each modulation sign by confirming estimating values of phase errors of one or more modulation signs, calculating an average value of the estimating values of one or more phase errors and taking the average value as the estimating value of the public phase error. Because a common transmitted modulation sign but not a pilot frequency signal of a known phase of the receiving equipment or a transmission parameter signaling is adopted to estimate the public phase error, the invention is less influenced by multiple paths, has higher accuracy on the estimation of the public phase error and effectively reduces the error code rate of a system. In addition, the invention adopts the less disturbed modulation signs to estimate the public phase error, thereby more accurately estimating the public phase error and further effectively reducing the error code rate of the system.

Description

technical field [0001] The present invention relates to a receiving device in a multi-carrier communication network, in particular to a method and a device for reducing the common phase error of received modulation symbols carried by multiple carriers in the receiving device. Background technique [0002] In communication systems, interference and noise usually exist during signal transmission. Taking a wireless communication system using OFDM modulation (hereinafter referred to as "OFDM system") as an example, a signal modulated by a sending device needs to be up-converted into a radio frequency signal by a tuner. In the receiving device, the received radio frequency signal needs to be down-converted into an intermediate frequency signal or a baseband signal by a tuner. The local oscillator in the tuner is unstable, and it is difficult to obtain an ideal sinusoidal signal for down-conversion, so that the frequency between the transmitting end and the receiving end is low. ...

Claims

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Application Information

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IPC IPC(8): H04L27/38H04L27/26H04L25/03
Inventor 林文敏苏佳宁郑华榕刘珂沈泊
Owner TAIDING MEDIA SHANGHAI
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