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Method for detecting receive signal of multi-input multi-output system and detector thereof

A technology for receiving signals and detecting methods, which is applied in the field of detectors and can solve problems such as poor performance

Inactive Publication Date: 2009-03-04
ZTE CORP
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Problems solved by technology

Although the SQRD detection method reduces the detection complexity, its performance is not as good as the MMSE-SIC detection method

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  • Method for detecting receive signal of multi-input multi-output system and detector thereof
  • Method for detecting receive signal of multi-input multi-output system and detector thereof
  • Method for detecting receive signal of multi-input multi-output system and detector thereof

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Embodiment Construction

[0033] The technical solution of the present invention will be described in more detail below with reference to the drawings and embodiments.

[0034] The invention provides a detection method and a detector for receiving signals in a MIMO system, and the method and detector are applicable to other communication systems that can be modeled as MIMO.

[0035] figure 1 is the basic principle block diagram of the MIMO system, the number of transmitting antennas is N, and the number of receiving antennas is M. At the transmitting end, the high-speed data bit stream is serially converted into N low-speed data streams, and each data bit stream is modulated and transmitted from different antennas at the same time; after the wireless channel fades, the signals and noises from different transmitting antennas are superimposed After being received by multiple antennas at the same time, the MIMO detector uses the channel state information generated by the channel estimation module to reco...

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Abstract

The invention provides a detection method and a detector of a received signal in a multi-input multi-output system, The method comprises the steps: a received signal rM and an estimated channel matrix H M multiplied by N are carried out with conversion, a converted received signal is obtained as the right formula (I) and a converted channel matrix is obtained as the right formula (II); and according to the converted received signal r M+N and a converted channel matrix shown in the right formula (III), a QR factorization method is adopted to detect and restore a sending signal. The detector comprises a channel conversation module and a QR factorization detection module, wherein, the channel conversation module is used for converting the channel matrix H M multiplied by N and the received signal rM, and the QR factorization detection module is used for detecting and restoring the sending signal by the QR factorization method according to the converted received signal rM+N and the converted channel matrix shown in the right formula (III). The invention is equivalent to the original used MMSE-SIC detection method, but the complexity is obviously reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a detection method and a detector for a received signal in a MIMO (Multiple Input Multiple Output) system. Background technique [0002] With the increase of mobile users and people's pursuit of mobile communication services has expanded from pure voice services to multimedia services, frequency resources are becoming increasingly tense. How to provide greater communication capacity within a limited frequency band has become a major challenge for the development of future high-speed wireless mobile communication systems. The MIMO system is a wireless communication system that uses multiple transmitting antennas and multiple receiving antennas for data transmission, and the channel capacity increases linearly with the increase of the number of antennas. Without increasing the bandwidth and transmission power, the spectrum utilization can be doubled. Because the MI...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L25/02H04B1/707H04B17/00
Inventor 段亚军王衍文李成恩赵琼孙云锋
Owner ZTE CORP
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