Repeater with ICS function and implementation method thereof

An implementation method and repeater technology, applied in baseband system components, shaping networks in transmitters/receivers, etc., can solve problems such as slow convergence speed, improve performance, have achievability, and optimize LMS algorithms Effect

Active Publication Date: 2011-05-18
SUNWAVE COMM
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Problems solved by technology

But the disadvantage is that the convergence speed is slow, so we use the method of inserting pseudo code to estimate the

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  • Repeater with ICS function and implementation method thereof
  • Repeater with ICS function and implementation method thereof
  • Repeater with ICS function and implementation method thereof

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Example Embodiment

[0095] Embodiment: The repeater with ICS function and the implementation method proposed in the present invention, based on the adaptive echo cancellation method and device of inserting pseudo-code, can effectively improve the influence of feedback echo interference in the wireless repeater system on the system. At the same time, the complexity is low and easy to implement. The method includes three parts: pseudo code insertion, initial channel estimation, and adaptive tracking, such as Figure 5 As shown, 501 is a cancellation module, and 502 is a filtering processing module, which mainly performs filtering processing for interference signals other than feedback echo interference. 503 is the switch module to control the CAZAC code link gating. 504 is the CAZAC code generation module. 505 is the initial channel estimation module, which mainly completes correlation operations. 506 is a variable step size adaptive algorithm module, which updates the weight coefficients of the 5...

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Abstract

The invention discloses a repeater with internet connection sharing (ICS) function and an implementation method thereof. The device is used for generating a feedback echo signal in a numeric field and cancelling partial echo signal interference in the received signal. The echo cancellation method comprises three parts, namely pseudo code insertion, channel initial estimation and adaptive tracking, wherein the inserted pseudo code is a constant amplitude zero auto correlation (CAZAC) code; in the channel initial estimation part, by utilizing the characteristic that the code is strongly auto correlated and weakly mutual correlated, the impact response and delay information of a channel are estimated through related operation; and an adaptive variable step-size algorithm is adopted in the adaptive tracking part, and the channel impact response obtained through initial estimation is used as an initial value of operating the algorithm, so that the convergence rate of the algorithm is improved. The invention has the advantages that: the convergence rate of an adaptive filter can be improved, and the performance of an echo canceller is improved; meanwhile, the algorithm complexity is not high, the calculated amount is small and the algorithm has implementability.

Description

technical field [0001] The invention relates to an echo cancellation technology in a repeater in the technical field of wireless communication, and mainly relates to a repeater with an ICS function and a realization method. Background technique [0002] In mobile communication, wireless network coverage will inevitably have weak signal areas or blind areas. The repeater is an effective supplementary method for wireless communication system coverage. It filters ground digital signals and amplifies the signals, which can effectively cover blind areas or weak areas. Area. [0003] The same-frequency forwarding mode of the repeater has the problem of mutual coupling between the transmitting and receiving antennas. When the receiving antenna receives the signal from the main base station, it simultaneously receives the signal transmitted by the transmitting antenna of the repeater. For example, figure 1 shown. Since the signal emitted by the transmitting antenna is reflected by...

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Application Information

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IPC IPC(8): H04L25/02H04L25/03
Inventor 宋葛施晓
Owner SUNWAVE COMM
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