Method and device for eliminating inter-carrier interference (ICI)
A carrier interference and subcarrier technology, applied in baseband system components, shaping network in transmitter/receiver, multi-frequency code system, etc. Interaction and other issues to achieve the effect of optimizing system performance and improving accuracy
Inactive Publication Date: 2013-06-26
ZTE CORP
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[0007] The present invention provides a sub-carrier interference ICI elimination method and device to at least solve the problem that the wireless channel in the prior art will destroy the orthogonality between sub-carriers in an OFDM system, cause interference between sub-carriers, and affect the performance of the system.
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[0030] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0031] In each of the following embodiments, communication may be implemented by a wireless connection or a wired connection or a combination thereof, which is not limited in the present invention.
[0032] In this embodiment, a subcarrier interference ICI elimination method is provided, figure 1 is a flowchart of a method for eliminating subcarrier interference ICI according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:
[0033] Step S102, acquiring channel time domain information according to the received signal and the transmitted signal corresponding to the received signal;
[0034] Step S104, according to the obtained time domai...
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The invention discloses a method and a device for eliminating ICI. The method comprises the steps of obtaining channel time-domain information according to a receiving signal and a transmitting signal corresponding to the receiving signal; obtaining an inter-carrier interference factor corresponding to a channel according to the obtained channel time-domain information; and eliminating the ICI according to the inter-carrier interference factor. The method and the device solve the problems that the performance of an orthogonal frequency division multiplexing (OFDM) system is affected by the ICI caused by the fact that channel time-varying characteristics in the prior art damage the inter-carrier orthogonality in the system, so that the inter-carrier interference factor can be obtained according to the channel time-domain information, the corresponding ICI can be eliminated, the accuracy of balanced demodulation can be improved, and the performance of the system is optimized.
Description
technical field [0001] The present invention relates to the communication field, in particular, to a subcarrier interference ICI elimination method and device. Background technique [0002] Orthogonal Frequency Division Muhiplexing (OFDM for short) is a digital multi-carrier modulation technology. The process can be realized by discrete Fourier transform (IFFT), and OFDM is especially suitable for frequency selective channels and high-speed data transmission channels. In the OFDM system, the duration of data symbols on each subcarrier is relatively increased, which can effectively reduce the inter-symbol interference caused by the time dispersion of the wireless channel, that is, Inter-Symbol interference (ISI for short). , therefore, the complexity of equalizing subcarriers in the receiver is reduced, and sometimes the equalizer may not be used, and the adverse effect of ISI can be eliminated only by inserting a cyclic prefix. [0003] The spectrum between the subcarriers...
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IPC IPC(8): H04L25/03H04L27/26
Inventor 江海秦洪峰李斌邱佳慧陶成
Owner ZTE CORP