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Multi-antenna system interference rejection device and method

An interference suppression device and multi-antenna system technology, applied in diversity/multi-antenna systems, baseband system components, space transmit diversity, etc., can solve the problems that IRC is not targeted, does not consider the impact of interference, and loses its effect

Inactive Publication Date: 2014-06-25
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

[0006] (2) Interference suppression combination: the maximum ratio combination algorithm does not consider the influence of interference. In the case of interference, the interference and white noise are regarded as noise, and the effect is lost when there is interference.
Compared with the traditional MRC algorithm, IRC considers the spatial characteristics of interference, and the effect of anti-interference is more obvious, but IRC is not targeted, and it does not make good use of its characteristics for narrowband interference

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Embodiment Construction

[0064] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0065] Such as figure 1 As shown, the multi-antenna system baseband receiver includes: an interference suppression module, a demodulation module and a sink module, wherein:

[0066] Interference suppression module: combine the baseband received signal vectors of M antennas to suppress interference;

[0067] Demodulation module: demodulate the data to obtain bit-level data;

[0068] Sink module: compare the received bit data with the transmitted bit-level data, and calculate the bit error rate.

[0069] Such as figure 2 As shown, a multi-antenna system interference suppression device includes a signal conversion module, a weighted combination module and a signal inverse conversion module;

[0070] Signal transformation module: used to t...

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Abstract

The invention discloses a multi-antenna system interference rejection device and method. The method includes the following steps that S1, a baseband signal vector ym is received according to a time domain, an intrinsic domain transformation matrix U is estimated, the received baseband signal is transformed to obtain an interferential intrinsic domain representation rm of the received baseband signal, and rm is equal to Uym; S2, as for each sampling moment, weighting merging is carried out on transformed values Uy1[n], Uy2[n],..., UyM[n] of M antennas to obtain an intrinsic domain estimated value; S3, inverse transformation is carried out on the intrinsic domain estimated value to obtain a desired signal estimated value. Compared with a traditional interference rejection combining algorithm, the device and method have the advantages that nonuniformity of narrow-band interference energy is made full use of in an intrinsic domain, interference and rejection are combined, and a better interference rejection effect is achieved.

Description

technical field [0001] The invention relates to digital interference suppression technology, in particular to a multi-antenna system interference suppression device and method. Background technique [0002] Narrowband interference is a common type of interference in communication systems. In the direction of interference suppression, most of the existing research is aimed at specific systems, such as Code Division Multiple Access (CDMA) systems and Orthogonal Frequency Division Multiplexing ( Orthogonal Frequency Division Multiplexing, OFDM) system. [0003] Antenna array technology is widely used in communication systems. By configuring an antenna array at the receiving end, that is, using multiple antennas at the receiving end to receive signals, it is the most common and most researched multi-antenna configuration method. Multi-antenna reception can use the properties of signals and channels to separate the received multipath signals into uncorrelated multi-channel signa...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04B7/04H04L25/03
Inventor 刘凤威赵宏志王务鹏唐友喜
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA