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Single carrier frequency domain equalization based selection feedback detecting method

A single-carrier frequency domain, feedback detection technology, used in multi-frequency code systems, baseband system components, shaping networks in transmitters/receivers, etc.

Active Publication Date: 2010-06-16
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] Technical problem: Based on the noise prediction model, the present invention proposes a selective feedback detection method based on single-carrier frequency domain equalization. The basic idea of ​​this method is to select the best time domain feedback signal to predict the interference noise of the current symbol to be detected. Through the calculation and equalization of tap coefficients similar to traditional FDE-NP, the performance can be significantly improved under the same complexity

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  • Single carrier frequency domain equalization based selection feedback detecting method

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Embodiment Construction

[0032] The basic idea of ​​the selective feedback detection method based on single-carrier frequency domain equalization is: according to the determined channel model and time domain feedback order, by calculating and comparing the average MMSE in various feasible feedback modes, select the one that minimizes the average MMSE Tap the feedback position to construct the filter with feedback. Then optimize the tap coefficients in the frequency domain and time domain according to the MMSE criterion, and use the filter formed by the tap coefficients to detect the sign information of the current data block. Depending on whether the structure of the time domain filter is fixed, the selective feedback detection methods based on single carrier frequency domain equalization can be divided into non-adaptive selective feedback detection and adaptive feedback detection methods.

[0033] Here it is assumed that the system has N T root transmit antenna, N R Root receiving antenna. The sou...

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Abstract

The invention provides a selective feedback detecting method based on the single-carrier wave frequency domain equalization, in particular to a mobile communication system for transferring high-speeddata via a plurality of sending antennas and receiving antennas, belonging to the technical field of single-carrier wave frequency domain equalization (SC-FDE) used for alleviating intersymbol interference in broadband system. The invention is characterized in that: on the receiving end of the multi-antenna transmission system or the receiving machine of the multi-antenna sending multi-antenna receiving single-carrier wave transmission system, a time domain feedback filter can be arranged on the tap feedback position minimizing the mean minimum mean square error by obtaining the mean minimummean square errors in all feasible feedback modes, according to certain channel mode and time domain feedback order, and based on the rule of minimum mean square error; the tap coefficients in frequency domain and time domain can be obtained based on the rule of minimum mean square error to the detecting signals, and then the filter formed by the tap coefficients is used to detect the symbolic information of the current data block. The invention can be divided into a non-adaptive feedback detecting method and an adaptive feedback detecting method according to whether the structure of the timedomain filter is stationary or not.

Description

technical field [0001] The present invention relates to a mobile communication system that transmits high-speed data by using multiple transmitting antennas / receiving antennas, and relates to a single-carrier frequency domain equalization (SC-FDE) technique for alleviating the problem of inter-symbol interference in a broadband system, in particular to a A signal detection method for a multi-antenna wireless communication system. The wireless communication system involved has one or more receiving antennas and one or more transmitting antennas. Background technique [0002] Research on information theory shows that under the condition of wireless channel with rich scattering, the multiple-input multiple-output (MIMO) system can obtain higher capacity than the single-send-single-receive system. At the transmitter, different transmit antennas send different symbol streams. At the receiving end, the transmitted symbols are recovered from the received symbols formed by superimp...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03H04B7/04
Inventor 高西奇赵唯王闻今
Owner HUAWEI TECH CO LTD
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