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Bayes-based phase noise compensation method

A compensation method and phase noise technology, applied in baseband systems, baseband system components, and shaping networks in transmitters/receivers, etc., can solve problems such as sine wave signal jumps, performance degradation of receiver systems, phase noise, etc.

Inactive Publication Date: 2016-08-31
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] In the signal transmission process of the 60GHz communication system, in addition to experiencing channel fading, it is also affected by nonlinear factors of radio frequency devices. These two factors degrade the performance of the system at the receiving end
However, there is a certain difference between the crystal oscillator and the phase-locked loop that generate the carrier, resulting in a short-term random difference between the carrier frequency and the target frequency, which in turn causes random phase jumps in the generated sine wave signal, which is manifested as phase noise

Method used

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Embodiment Construction

[0031] Below in conjunction with embodiment and Attached picture , to describe the technical solution of the present invention in detail.

[0032] S1. Realize channel estimation by using a channel estimation sequence, including:

[0033] 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.

[0034] S12. At the receiving end, the signal in the time domain can be obtained in the form of 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, A N × N is an N×N diagonal matrix composed of phase noise, h N × N is a Toeplitz matrix composed of the equivalent time-domain channel impulse response, x N × 1 is an N×1 column vector composed of transmitted d...

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Abstract

The invention, which belongs to the technical field of wireless communication, especially relates to the field of phase noise estimation realization by using an iterative method in a wireless communication system. According to the invention, on the basis of a channel estimation sequence, an equivalent discrete time-domain channel impulse response is estimated; a common phase error (CPE) of the phase noises is estimated by interpolation; and then phase noise compensation is realized by using an iterative method. Therefore, the system reliability 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 phase noise estimation through an iterative method in a wireless communication system. Background technique [0002] The development of wireless communication has entered a new era. Accompanied by the explosive development of mobile multimedia applications, it marks that communication has had a huge impact on people's lives, and its importance is self-evident. Currently commonly used communication technologies such as the 802.11n standard and Ultra Wideband (UWB) can achieve data transmission up to 300M / s, but they can no longer meet people's needs for higher-speed real-time transmission, and are relatively low The wireless communication frequency band of the world is already crowded, for this reason, a new generation of high-speed high-frequency wireless transmission technology has been researched one after another. [0003] For a long time...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L25/02
CPCH04L25/0212H04L25/03159H04L2025/03611
Inventor 娄念念成先涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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