Interference elimination method and device

A technology of interference elimination and preset range, applied in the field of communication, can solve the problem of complex searcher, etc., and achieve the effect of reducing the requirements of search accuracy

Active Publication Date: 2012-02-01
如东县东广物流有限公司
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Problems solved by technology

[0012] Aiming at the performance defects of the parametric interference elimination method in the prior art and the problem that the requ

Method used

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  • Interference elimination method and device

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Embodiment approach

[0050] Preferably, signal reconstruction can be performed according to the following formula: in, Represents the reconstructed signal, c[k] represents the data to be reconstructed after spreading and scrambling, Represents the estimated value of the joint channel response, k is the chip index, and l is the multipath index.

[0051] The non-parametric signal reconstruction can be completed through the above formula.

[0052] After the joint channel response g(t) is determined, the sampling of the joint channel response at a certain moment is The method of joint channel estimation (that is, get The method) is the same as the channel estimation method of the traditional parametric method, and will not be repeated here.

[0053] Moreover, since the channel estimation itself is a joint channel response including the RRC at the transmitting end, the channel and the RRC at the receiving end. Therefore, it is no longer necessary to use the RC filter to simulate the RRC filte...

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Abstract

The invention discloses an interference elimination method and an interference elimination device. The method comprises the following steps of: acquiring an estimated value of a joint channel response, wherein the joint channel response is a continuous process of transmitting data to a receiver through a channel by a transmitter; performing signal reconstruction by using the estimated value of the joint channel response; and performing interference elimination according to a reconstructed signal. By the technical scheme provided by the invention, the performance shortcomings of a parametrization interference elimination method in the prior art are overcome, the problem of complexity of a required searcher in the prior art is solved, and the requirements of a system on searching accuracy are reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular, to an interference elimination method and device. Background technique [0002] In the CDMA (Code Division Multiple Access) system, ISI (Inter-Symbol Interference, Inter-Symbol Interference) generated by multipath and wireless channel distortion leads to non-orthogonality between codes, making multipath and multi-code Interference between multiple channels and multiple users has become a common problem in wireless communication systems, which limits the system capacity. At the same time, this problem is further exacerbated as the data transmission rate is further increased. Although existing Rake receivers and equalizer receivers can solve problems such as multipath interference to a certain extent, they cannot reduce multiple access interference. In order to reduce the impact of multiple access interference, the method of interference cancellation is proposed. The idea of ​​th...

Claims

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Application Information

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IPC IPC(8): H04B1/711H04B1/7107
Inventor 梁艳任震刘涛
Owner 如东县东广物流有限公司
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