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Combined transmit beamforming method based on array antenna and MIMO

A technology of beamforming and array antennas, applied in the field of beamforming based on array antennas and multiple-input multiple-output joint transmission, can solve problems such as system performance deterioration, achieve the effects of expanding reliability, overcoming diversity gain, and enhancing perception

Active Publication Date: 2011-10-19
天元瑞信通信技术股份有限公司
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Problems solved by technology

The disadvantage of the method and device disclosed in this patent application is that the method limits each user to allocate only one beam. If there are many scatterers in the wireless communication environment, this allocation method is not optimal, and a user may There will be multiple optimal beams, and under non-line-of-sight conditions, using this method will quickly degrade system performance

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  • Combined transmit beamforming method based on array antenna and MIMO
  • Combined transmit beamforming method based on array antenna and MIMO
  • Combined transmit beamforming method based on array antenna and MIMO

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] refer to figure 2 The antenna configuration of the transmission point in the embodiment of the present invention is 4 sub-arrays, figure 2 The number m of the middle array is 4, and each sub-array deploys 4 array elements. The 4 subarrays are independent of each other, and the 4 array elements on each subarray are strongly correlated.

[0031] Refer to attached figure 1 The steps for realizing the present invention are described in detail.

[0032] Step 1, initialization.

[0033] The transmission point sets the number of sending beams n to 1, and the initial performance value Q 0 Set to 0. The beam performance value refers to the three indicators of system throughput, coverage and spectrum utilization rate, and one of the indicators is selected for optimization according to the performance value concerned by the system. Since this embodiment ...

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Abstract

The invention discloses a combined transmit beamforming method based on an array antenna and MIMO (Multiple Input Multiple Output). The method comprises the following steps: (1) initialization; (2) obtainment of omni-directional channel state information; (3) obtainment of space real wave beam; (4) data transmission to first n wave beams; (5) equivalent channel estimation; (6) obtainment of virtual wave beam; (7) obtainment of combined BF (beamforming) performance number; (8) selection of optimal wave beam number send by AA-BF; (9) data transmission. According to the invention, diversity gain, reuse gain, and array gain brought by multi-antenna system are simultaneously obtained, the reliability of communication link is improved, the frequency spectrum utilization rate and throughput of a wireless communication system are increased to a maximum limit, the coverage scope of wireless communication is enlarged to a maximum limit, and the communication demands of a user under line-of-sight and non-line-of-sight conditions are simultaneously satisfied. Thereby, the communication quality of the user is improved, and the perception of the user is enhanced.

Description

technical field [0001] The invention belongs to the field of communication technology, and further relates to a joint transmission beamforming method based on an array antenna and Multiple Input Multiple Output (MIMO), which can improve the spectrum utilization rate, throughput, and reliability of a wireless communication system. performance and expand the coverage of wireless communication. Background technique [0002] There are two types of existing transmission beamforming technologies: one is a beamforming technology based on MIMO precoding, and the other is a beamforming technology based on an array antenna. [0003] The first is the beamforming technology based on MIMO precoding. [0004] MIMO beamforming (MIMO-BF), also known as MIMO precoding technology, is a signal that uses channel state information (CSI) at the transmitter to preprocess the transmitted symbols to increase system capacity or reduce the system bit error rate. processing technology. MIMO-BF requi...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/08
Inventor 张海林赵力强孟凯凯李勇朝
Owner 天元瑞信通信技术股份有限公司
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