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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: 2021-11-23
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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  • Low-complexity signal detection method and system

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Embodiment

[0092] Embodiment: take the number of antennas N=128 and modulate 256-QAM as an example for illustration. 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 embodiment of the present application. In the proposed ILMPD method, when the number of users k=8, the users are divided into two layers for iterative detection. In other cases, users are divided into 4 layers for iterative detection. For k=32, 16, 8, the maximum iterations of the two MPD methods are set to 7, 5, 4 respectively. Such as 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 is compared with the original LCMPD method at all simulated signal-to-noise ratio (SNR) points with almost no loss , and outperforms the MMSE method.

[0093] ...

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Abstract

The invention relates to the technical field of antenna signal detection, and provides a low-complexity signal detection method and system, and the low-complexity signal detection method employs a layered updating mode, and is more beneficial to the design and implementation of a high-throughput hardware architecture. And meanwhile, through algorithm transformation or approximation, the algorithm and implementation complexity is effectively reduced. In the interference elimination process, the constellation point characteristics are utilized, operation is carried out on an operand with a smaller bit width, a critical path during hardware implementation is effectively shortened, and implementation complexity is reduced; in the constellation matching process, a new reliability measurement method is provided by utilizing the characteristics of a quadratic function, so that the number of required multiplication and addition operations is reduced by half respectively; a signal detection method is reconstructed into initialization and iteration steps so as to reduce the processing period, and multiplication, addition and sorting operations required in the initialization process are completely eliminated through an approximation method.

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 on data transmission rate. Since the massive multiple-input multiple-output technology (Multiple-Input Multiple-Output, MIMO) can bring diversity gain and spatial multiplexing gain at the same time, it can significantly improve the data transmission rate of wireless communication, and has become the fifth generation (5G) wireless communication system. One of the key technologies. By deploying dozens to hundreds of antennas in base stations, massive MIMO systems show great advantages in terms of power efficiency, spectrum efficiency, and link reliability. [0003] However, a large number of antennas and users will lead to more complex signal processing, which brings gr...

Claims

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Application Information

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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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