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Method for improving compensation restraint of phase noise

A phase noise compensation and phase noise technology, applied in the field of phase noise compensation and suppression, to reduce the bit error rate and improve reliability

Inactive Publication Date: 2014-04-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the appearance of phase noise spreads part of the power of the oscillator to adjacent frequencies, resulting in sidebands

Method used

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  • Method for improving compensation restraint of phase noise
  • Method for improving compensation restraint of phase noise
  • Method for improving compensation restraint of phase noise

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specific Embodiment approach

[0027] S1. Realize channel estimation by using a channel estimation sequence, including:

[0028] S11. The channel estimation sequence is a sequence composed of some known symbols. For example, the single-carrier channel estimation sequence in the 802.11.ad standard is [-Gb 128 ,-Ga 128 ,Gb 128 ,-Ga 128 ,-Gb 128 , Ga 128 ,-Gb 128 ,-Ga 128 ,-Gb 128 ], where Ga 128 and Gb 128 is a Gray sequence.

[0029] S12. At the receiving end, we can obtain the signal in the time domain expressed as a matrix: y N×1 =A N×N h N×N x N×1 +w N×1 , where y N×1 is in the form of an N×1 column vector, which is affected by phase noise and white Gaussian noise. A N×N is an N×N diagonal matrix composed of phase noise, h N×N is the Toeplitz matrix composed of the equivalent time-domain channel impulse response, x N×1 is an N×1 column vector composed of transmitted data, w N×1 is an N×1 noise vector.

[0030] S13. We can not only use some traditional channel estimation methods, such ...

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Abstract

The invention belongs to the technical field of wireless communication, and particularly relates to method for achieving compensation restraint of phase noise in a wireless communication system through an iteration method. The method comprises the steps that firstly, an equivalent dispersion time domain channel impulse response is estimated through a channel estimation sequence; then, a CPE of the phase noise is estimated through interpolation; finally, noise phase compensation is achieved through the iteration method. According to the method for achieving the compensation restraint of the phase noise, the reliability of the system is improved and the error rate is reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to realizing the compensation and suppression of phase noise by using an iterative method in a wireless communication system. Background technique [0002] With the explosive growth of people's demand for wireless communication, spectrum resources are becoming more and more precious. Correspondingly, this requires us to better deal with phase noise issues such as local oscillators. [0003] In an actual communication system, the signal distortion generated by the analog front end will cause the system performance to degrade. Due to the trade-off of area, power consumption and cost of the RF circuit, the signal distortion generated by the analog front end is inevitable. An important linearity distortion in the analog front-end of wireless communication is caused by the random phase noise of the voltage-controlled oscillator or the phase-locked loop. [0...

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Application Information

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IPC IPC(8): H04L25/02H04L25/03
Inventor 袁波成先涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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