Low-complexity signal detection method for MIMO FBMC-OQAM (Multiple Input Multiple Output Filter Bank Multicarrier Offset-QAM) system

A system signal and detection method technology, applied in the transmission system, multi-carrier system, digital transmission system, etc., can solve the problems of MIMO technology combination constraints, achieve good detection performance, eliminate system internal interference, and improve computing efficiency.

Active Publication Date: 2017-05-24
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] However, also due to the characteristics of FBMC,

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  • Low-complexity signal detection method for MIMO FBMC-OQAM (Multiple Input Multiple Output Filter Bank Multicarrier Offset-QAM) system
  • Low-complexity signal detection method for MIMO FBMC-OQAM (Multiple Input Multiple Output Filter Bank Multicarrier Offset-QAM) system
  • Low-complexity signal detection method for MIMO FBMC-OQAM (Multiple Input Multiple Output Filter Bank Multicarrier Offset-QAM) system

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[0031] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] figure 1 It is the transmitter and receiver models of the FBMC-OQAM system. The multi-user multiple-input multiple-output (Multiple Input Multiple Output, MIMO) filter bank multi-carrier (Filter bank multicarrier Offset-QAM, FBMC-OQAM) system model in the present invention is as follows figure 2 Shown: N t and N r are the number of transmitting antennas and the number of receiving antennas, respectively, n and k represent low-rate signals and high-rate signals, respectively, and M represents the number of subcarriers. When each receiver receives the desired number of signals, it also receives signals from other N t - 1 undesired transmitter interference signal, these interference signals combined with the characteristics of the filter bank constitute the internal interference of the system. Therefore, the signal received by the...

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Abstract

The invention discloses a low-complexity signal detection method for an MIMO FBMC-OQAM (Multiple Input Multiple Output Filter Bank Multicarrier Offset-QAM) system. According to the method, channel matrix characteristics are combined with a list sphere detection algorithm; QR decomposition is carried out on an equivalent channel matrix subjected to imaginary and real separation, and the internal interference of the MIMO FBMC-OQAM system is completely eliminated through utilization of obtained unitary matrix orthogonal characteristics; signals are detected through adoption of the list sphere detection algorithm, and a candidate solution vector list is generated through a Grover quantum search algorithm; and a likelihood ratio is solved through utilization of soft information carried in the list, thereby obtaining bit-level output. According to the method, the problem that in the MIMO FBMC-OQAM system, high-order modulation complexity is relatively high is effectively solved through adoption of the Grover quantum search algorithm; the computing complexity is reduced to a certain degree; and the good detection performance is ensured.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to the field of multiple input multiple output (Multiple Input Multiple Output, MIMO) filter bank multicarrier-offset quadrature amplitude modulation (Filter Bank Multicarrier Offset-QAM, FBMC-OQAM) system field, and relates to a A low-complexity MIMO FBMC-OQAM system signal detection method. Background technique [0002] In the fourth-generation mobile communication, the advantages of multiple input multiple output (Multiple Input Multiple Output, MIMO) technology in improving system capacity and Orthogonal Frequency-division Multiplexing (OFDM) technology in combating multipath fading , The combination of the two has aroused deep concern in the industry for a period of time. However, in the fifth generation mobile communication system (5G), the application of OFDM in 5G is limited due to its low spectrum utilization and sensitive uplink synchronization. Filter Ban...

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Application Information

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IPC IPC(8): H04L1/00H04L25/03H04B7/0413H04L27/38
Inventor 景小荣孙玮郑建宏
Owner CHONGQING UNIV OF POSTS & TELECOMM
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