Active echo self-interference suppression scheme of wireless broadband multi-antenna MIMO full-duplex system

Abstract

The invention discloses an active echo self-interference suppression scheme of a wireless broadband multi-antenna MIMO full-duplex system. A wave beam forming technology and self-adaption iteration filtering processing are applied to a full-duplex self-interference suppression method, pre-weighting processing is carried out all paths of emitting signals on a sending side through airspace wave beam forming, and echo self-interference signals are accurately estimated and eliminated on a receiving side through repeated iteration of a self-adaptive filtering algorithm. An FD-MIMO system frame is introduced through an airspace wave beam forming method, the broadband wireless FD-MIMO system echo self-interference suppression scheme combined with an active suppression mechanism is provided, the high self-interference signals of the full-duplex (FD) system are suppressed obviously, meanwhile, the bit error rate (BER) performance of the system is effectively controlled, the channel transmission capacity of the system is comprehensively improved, and the overall performance of the full-duplex system is improved. Under the condition of a fading channel, the bit error rate (BER) and system capacity of the full-duplex system under an existing ideal channel can be achieved, and the scheme can be used for various new-generation broadband wireless full-duplex communication systems.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to an active echo self-interference suppression method for a wireless broadband multi-antenna MIMO full-duplex system. Background technique [0002] Compared with the traditional time division duplex TDD and frequency division duplex FDD systems, the wireless full duplex FD system has the characteristics of sending and receiving signals at the same time and at the same frequency under single channel conditions, which can more efficiently use the increasingly tight wireless spectrum resources Therefore, it has become a key popular technology for the evolution of the new generation mobile communication system and wireless personal area network system architecture and standards. [0003] However, due to the fact that the full-duplex FD system transmits and receives signals at the same frequency at the same time, the full-duplex FD communication system has a v...

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