A Signal Restoration Method Based on Frequency Domain Equalization
A frequency domain equalization and signal technology, applied in channel estimation, baseband system components, transmission line coupling devices, etc., can solve the problem of low restoration accuracy of communication signals
Active Publication Date: 2019-11-15
SOUTH CHINA UNIV OF TECH
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[0005] In view of this, the present invention provides a signal restoration method based on frequency domain equalization to solve the problem of low accuracy of communication signal restoration in the prior art
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[0033] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.
[0034] The terminology used in the present invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used herein and in the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as use...
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The invention provides a signal restoration method based on frequency domain balance. The method comprises the following steps: obtaining a to-be-restored signal; performing forward channel estimation on n training sequence zn of the to-be-restored signal to obtain forward channel estimation (the formula is as shown in the specification) of the n signal; balancing the n data yn of the to-be-restored signal according to (the formula is as shown in the specification) to obtain first estimation (the formula is as shown in the specification) of the n sending signal; performing reverse channel estimation by using n+1 training signal zn+1 of the to-be-restored signal and the first estimation (the formula is as shown in the specification) of the sending signal to obtain reverse channel estimation (the formula is as shown in the specification) of the n signal; performing maximal-ratio combining frequency domain balance calculation on the to-be-restored signal according to the (the formula is as shown in the specification) and the (the formula is as shown in the specification) by means of the (the formula is as shown in the specification), and updating the n sending signal into second estimation (the formula is as shown in the specification); and performing demodulation and decoding on the second estimation according to the modulation and coding mode of a sending end. By implementation the signal restoration method provided by the invention, the signal restoration precision can be improved.
Description
technical field [0001] The invention relates to the field of electrical data processing, in particular to a signal restoration method based on frequency domain equalization. Background technique [0002] With the diversified development of communication services, data services and multimedia services have surpassed traditional voice services to become the main carrier of wireless communication transmission, and the information explosion has triggered a huge amount of network data and video information that needs to be transmitted urgently. Communications pose a serious challenge. [0003] In all communication systems, the time-varying multipath wireless channel is the most complex and variable one. The wireless channel is the propagation path between the base station antenna and the user antenna. Due to the complexity of the propagation path between the receiver and the transmitter, the propagation path ranges from simple line-of-sight propagation to various complex terrain...
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IPC IPC(8): H04L25/02
CPCH04L25/0202H04L25/0264
Inventor 余华张硕张军季飞陈芳炯
Owner SOUTH CHINA UNIV OF TECH