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A low-complexity signal detection method and system

A signal detection, low-complexity technology, applied in the field of low-complexity signal detection methods and systems, can solve the problem that the hardware implementation is not particularly friendly, and achieve the effect of facilitating design and implementation, reducing the number of iterations, and reducing the number

Active Publication Date: 2022-08-02
NANJING UNIV
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Problems solved by technology

However, the serial-parallel update method of the LCMPD method is not particularly friendly to hardware implementation, and there are still many multiplication and addition operations in the constellation matching process of this method, resulting in a certain calculation redundancy that still needs to be further optimized

Method used

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  • A low-complexity signal detection method and system
  • A low-complexity signal detection method and system
  • A low-complexity signal detection method and system

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Embodiment

[0092] Embodiment: Take the number of antennas N=128 and the modulation of 256-QAM as an example for description. The signal detection of the MIMO system model adopts the minimum mean square error method (MMSE), the low complexity message passing method (LCMPD), and the improved layered message passing method (ILMPD) provided by the embodiments of the present application. In the proposed ILMPD method, when the number of users k=8, users are divided into 2 layers for iterative detection. In other cases, users are divided into 4 layers for iterative detection. For k=32, 16, 8, the maximum number of iterations for the two MPD methods is set to 7, 5, and 4, respectively. like figure 2 As shown, in the case of lower complexity, the bit error rate (Bit Error Rate) performance of the scheme of the embodiment of the present application has almost no loss in all simulated signal-to-noise ratio (SNR) points compared with the original LCMPD method. , and outperforms the MMSE method. ...

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Abstract

The present application relates to the technical field of antenna signal detection, and provides a low-complexity signal detection method and system. The low-complexity signal detection method adopts a layered update method, which is more conducive to the design of a high-throughput hardware architecture. with realization. At the same time, through algorithm transformation or approximation, the algorithm and implementation complexity are effectively reduced. In the process of interference elimination, using the characteristics of constellation points, it is proposed to perform operations on operands with smaller bit widths, which can effectively shorten the critical path of hardware implementation and reduce the implementation complexity; in the process of constellation matching, the characteristics of quadratic functions are used. , a new reliability metric method is proposed, which reduces the number of required multiplication and addition operations by half; the signal detection method is refactored into initialization and iterative steps to reduce the processing cycle, and the initialization process is approximated by an approximation method. The multiplication, addition and sorting operations required in the

Description

technical field [0001] The present application relates to the technical field of antenna signal detection, and in particular, to a low-complexity signal detection method and system. Background technique [0002] With the development of wireless communication services, people have higher and higher requirements for data transmission rates. Since massive multiple-input multiple-output (MIMO) technology can bring diversity gain and spatial multiplexing gain at the same time, significantly improve the data transmission rate of wireless communication, it has become the fifth generation (5G) wireless communication system. one of the key technologies. By deploying tens to hundreds of antennas at base stations, massive MIMO systems show great advantages in terms of power efficiency, spectral efficiency, and link reliability. [0003] However, the large number of antennas and users will lead to more complex signal processing, which brings great challenges to the design of high-thro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04B7/0413
CPCH04L1/0048H04L1/0051H04L1/0052H04B7/0413
Inventor 王中风宋苏文林军
Owner NANJING UNIV
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