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Matrix Gerschgorin circle based transmitting antenna number blind estimation method

A technique for transmitting antenna number and blind estimation, applied in the direction of space transmit diversity, diversity/multi-antenna system, baseband system components, etc., to achieve the effect of solving frequency selective fading, improving real-time performance and strong robustness

Active Publication Date: 2016-10-26
XIDIAN UNIV
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Problems solved by technology

[0005] However, under the conditions of frequency selective fading channel and residual frequency offset, and without using prior information such as pilot frequency, none of the above three methods can achieve accurate blind estimation of the number of transmit antennas for MIMO-OFDM systems

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  • Matrix Gerschgorin circle based transmitting antenna number blind estimation method
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  • Matrix Gerschgorin circle based transmitting antenna number blind estimation method

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution, and provides detailed implementation and specific operation process, but the protection scope of the present invention is not limited to the present invention. Example.

[0035] refer to figure 1 , the present invention assumes that: the system model used includes a transmitter, a receiver and a listener, here the design of the listener is mainly concerned.

[0036] The number of antennas of the listener N r =8, the number of antennas of the transmitter N t =2, OFDM system modulation subcarrier number N subcarrier =64, estimate the number of OFDM signal frames used N frame =40, the channel order is the multipath number plus 1, that is, L order =L multipath +1=5.

[0037]The process of blind estimation of the number of transmitting antennas in the present invention is as follows: figure 2...

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Abstract

The invention invention discloses a matrix Gerschgorin circle based transmitting antenna number blind estimation method. Efficient estimation of the number of transmitting antennas of an MIMO-OFDM system is realized without utilizing prior information such as a pilot frequency in the conditions of a frequency selective fading channel and residential frequency deviation. The matrix Gerschgorin circle based transmitting antenna number blind estimation method mainly comprises the steps of (1) constructing a received signal matrix of two adjacent sub-carriers; (2) calculating a covariance matrix; (3) constructing a unitary transformation matrix; (4) performing unitary similarity transformation; (5) constructing a judgment criterion expression; and (6) determining the number of the transmitting antennas. The matrix Gerschgorin circle based transmitting antenna number blind estimation method solves the problems of blind identification of the number of the transmitting antenna in the malicious conditions of the frequency selective fading channel, a low signal to noise ratio and residential frequency deviation.

Description

technical field [0001] The present invention relates to a method for estimating the number of transmitting antennas, in particular to a MIMO-OFDM (Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing, Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing) system under a frequency selective fading channel The method for estimating the number of transmitting antennas can be used for blind identification of communication signals and cognitive radio in the case of residual frequency offset, and belongs to the technical field of wireless communication. Background technique [0002] The development goals of the new generation wireless communication system are higher transmission rate, better service quality, and higher spectrum utilization. However, in the mobile wireless communication system, there are problems of spectrum resource shortage and high-speed data transmission easily causing channel frequency selective fading, so MIMO-OFDM tec...

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Application Information

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IPC IPC(8): H04B7/04H04B7/06H04L25/02
Inventor 李勇朝李涛高明君张海林
Owner XIDIAN UNIV
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