Multi-input multi-output signal detection method and device

A signal detection and multi-output technology, which is applied in the direction of preventing/detecting errors through diversity reception, diversity/multi-antenna system, space transmission diversity, etc., can solve the problem of signal detection performance degradation, and achieve the effect of speeding up signal detection

Inactive Publication Date: 2010-03-03
ST ERICSSON SEMICON BEIJING
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Problems solved by technology

The breadth-first sphere decoding method can control the number of searches, thereby controlling the amount of calculation, but because it discards part of the search path, it will lead to a decrease in the performance of signal detection

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  • Multi-input multi-output signal detection method and device
  • Multi-input multi-output signal detection method and device
  • Multi-input multi-output signal detection method and device

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0030] figure 2 It is a flow chart of the MIMO signal detection method provided by the present invention.

[0031] image 3 is adopted figure 2 Schematic diagram of the search tree for MIMO signal detection by the method shown.

[0032] figure 2 The method shown is suitable for systems with two receiving antennas, such as figure 2 As shown, the method includes:

[0033] Step 201, storing in advance the Euclidean distance relationship between all constellation points corresponding to each modulation mode adopted by the system and the positions on the constellation diagram.

[0034] In this step, for each modulation method, according to the positions of all constellation points corresponding to the modulation method on the constellation diagram,...

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Abstract

The invention discloses an MIMO signal detection method and a device that are applied in a system with two receiving antennas. The method includes the following steps: storing the respective size relationship between all constellation points corresponding to modulation modes adopted by the system and the Euclidean distance of positions on a constellation diagram in advance; conducting sequencing QR decomposition on channel matrix and demodulating a first layer of signal points from a receiving signal according to elements at the lower right corner of R matrix; according to the size relationship of the Euclidean distance corresponding to the modulation mode adopted by the first layer of signal points, finding out the first layer of K constellation points with the minimum Euclidean distancefrom the position of the first layer of signal points on the constellation diagram; and searching a second layer of constellation points based on every found constellation point of the first layer, selecting a search path with the minimum Euclidean distance from all search paths where the first layer of constellation points is located and determining the signal detection result according to the first layer of constellation points and the second layer of constellation points on selected K search paths. The application of the method and the device can ensure signal detection performance and simultaneously reduce the complexity of MIMO signal detection.

Description

technical field [0001] The invention relates to the technical field of signal processing in a mobile communication system, in particular to a multiple-input multiple-output (MIMO) signal detection method and device. Background technique [0002] In the current wireless communication standard and its evolution process, multiple input multiple output (Multiple Input Multiple Output, MIMO) antenna technology has been widely used, such as 3GPP long term evolution (Long Term Evolution, LTE) system and 802.16 series technology evolution version The system adopts MIMO technology. Received signals (hereinafter referred to as MIMO signals) of a system adopting MIMO technology (hereinafter referred to as MIMO system) overlap each other in time domain and frequency domain, so the complexity of MIMO signal detection is relatively large. [0003] Theoretically, the MIMO signal can be detected by the Maximum Likelihood (ML) detection method, but since the ML detection method needs to tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04B7/08
Inventor 邓冰牟秀红
Owner ST ERICSSON SEMICON BEIJING
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