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Improved MIMO signal detection method

A signal detection and signal technology, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve problems such as limited range of use, low accuracy, and difficulty in implementation, so as to reduce algorithm complexity and improve reliability , Adaptable effect

Inactive Publication Date: 2016-10-26
NANJING UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] It can be seen from the above that the ML detection algorithm is extremely complex and difficult to implement in practical applications.
Although the complexity of ZF-OSIC is low, but the accuracy is too low, this defect limits its scope of use

Method used

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Embodiment

[0039] The whole system consists of figure 1 . The system adopts the V-BLAST system with 4 transmissions and 4 receptions. Data bit stream length is 8×10 6 , the modulation method is 4QAM. Assuming that the transmission channel is a flat Rayleigh fading channel, the channel state information is known at both the sending and receiving ends, and the receiving end has achieved timing and symbol synchronization.

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Abstract

The invention discloses an improved MIMO signal detection method. A ZF-OSIC (Zero Forcing Ordered Successive Interference Cancellation) algorithm is first employed to detect the receiving signal of a V-BLAST system to obtain a detection result of the ZF-OSIC algorithm. The detection result is low in reliability owing to the defect of the ZF-OSIC algorithm. Based on the detection result, the improved MIMO signal detection method employs an ML (Maximum Likelihood) rule to correct one or more than one element in the detection result. The number of correction elements is selected based on practical situations so as to meet demands for complexity and error rate from practical applications. The improved MIMO signal detection method keeps lower complexity, meanwhile obtains a lower error rate, and possesses greater adaptability.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to an improved MIMO signal detection method. Background technique [0002] The multiple-input multiple-output system is referred to as the MIMO system, which uses space diversity to improve spectrum utilization, and is a promising technology in the fourth generation of mobile communications. MIMO technology improves information transmission rate and data reliability, and has high energy efficiency. Due to the large number of antennas at the transceiver end, the received signal detection is a problem worthy of study no matter for traditional MIMO or massive MIMO system. [0003] For the detection of received signals in MIMO systems, maximum likelihood detection (Maximum Likelihood, ML), zero-forcing detection (Zero Forcing, ZF), serial interference cancellation (Successive Interference Cancellation, SIC), and spherical decoding (sphere decoding, SD) can be used. and ...

Claims

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Application Information

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IPC IPC(8): H04B7/08
CPCH04B7/0854H04B7/0857
Inventor 王芮朱唯唯谢仁宏芮义斌郭山红李鹏张家庆陈倩
Owner NANJING UNIV OF SCI & TECH