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Pilot frequency-based channel ridge assessment method for single carrier system

A single-carrier and ridge estimation technology, applied in the direction of multi-frequency code system, baseband system components, etc., can solve the problems of poor system stability and no anti-interference, and achieve strong anti-interference, stable system performance, and estimation accuracy high effect

Inactive Publication Date: 2012-07-18
山东严格产业发展有限公司
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Problems solved by technology

[0024] The present invention aims to solve the problem that the existing channel LS estimation method does not have anti-interference ability when the observed signal is abnormally polluted, resulting in poor system stability, and thus proposes a pilot-based channel ridge estimation method in a single-carrier system

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  • Pilot frequency-based channel ridge assessment method for single carrier system
  • Pilot frequency-based channel ridge assessment method for single carrier system
  • Pilot frequency-based channel ridge assessment method for single carrier system

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specific Embodiment approach 1

[0054] Specific implementation mode 1. Combination figure 1 Illustrate this specific embodiment, the pilot-based channel ridge estimation method in the single-carrier system, it is realized by the following steps:

[0055] Step A, at the receiving end of the single-carrier system, perform Fourier transform on the data block obtained after removing the cyclic prefix from the received block frame to obtain frequency domain pilot data;

[0056] Step B, expressing the frequency domain pilot data in step A as matrix form:

[0057] Among them, the received frequency domain pilot vector Y is:

[0058] Y=[Y 1 Y 2 ...Y N ] T (1)

[0059] In the formula, T is the transpose symbol of the matrix, and N is the length of the pilot sequence;

[0060] Send the frequency domain pilot as a diagonal matrix X:

[0061] X=diag(X 1 , X 2 ,...,X N ) (2)

[0062] The channel frequency response H is:

[0063] H=[H 1 h 2 …H N ] T (3)

[0064] The ...

specific Embodiment approach 2

[0080] Embodiment 2. The difference between this embodiment and the pilot-based channel ridge estimation method in the single-carrier system described in Embodiment 1 is that when λ=1, the ridge estimation value of the channel frequency response H for:

[0081] H ^ = ( X H X + N σ 2 I ) - 1 X H Y - - - ( 9 ) .

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Abstract

A pilot frequency-based channel ridge assessment method for a single carrier system aims to solve the problem that the stability of the system is poor, because a conventional channel LS assessment method has no anti-interference performance when observance signals are abnormally polluted. According to the invention, an auxiliary pilot frequency sequence is utilized, the received pilot frequency sequence and an ideal sending sequence in a communication system of the single carrier system are compared in a frequency domain, and the channel state information is extracted through the edge assessment method. Therefore, the method is suitable for the single carrier system.

Description

technical field [0001] The present invention relates to a pilot-based channel ridge estimation method. Background technique [0002] In a wireless communication system, the transmitted signal is affected by wireless multipath channels, and there are channel attenuation and superimposed noise and interference. At the receiving end, if the received signal is directly demodulated and decoded at this time, it will be difficult to accurately recover the data, and the bit error rate of data transmission is very high, resulting in the failure of the communication system to operate normally. Therefore, it is extremely necessary to estimate the relevant parameters of the channel conditions of the communication system, and estimate the influence of the current channel on the signal amplitude and phase. [0003] The main function of channel estimation is to use the estimated channel state information (Channel State Information, CSI) for equalization processing of received signals, inc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 马琳李秀华谭学治王孝孙鹏飞魏守明李夏
Owner 山东严格产业发展有限公司