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Method and system for calibration facing parallel multi-channel wireless channel measurement

A calibration method and wireless channel technology, applied in the field of calibration systems, can solve problems such as affecting calibration accuracy, and achieve the effects of avoiding measurement errors, meeting the needs of channel measurement, and shortening calibration time.

Inactive Publication Date: 2017-08-29
SHANGHAI RES CENT FOR WIRELESS COMM +1
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Problems solved by technology

In addition, even if the multi-channel concurrent detection signals adopt an orthogonal sequence, due to the difference in the time delay of the receiving end, they will interfere with each other and affect the calibration accuracy.

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  • Method and system for calibration facing parallel multi-channel wireless channel measurement
  • Method and system for calibration facing parallel multi-channel wireless channel measurement
  • Method and system for calibration facing parallel multi-channel wireless channel measurement

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Embodiment Construction

[0039] The technical content of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] Figure 4It is a block diagram of eight antenna ports transmitting / receiving data in parallel in one embodiment of the present invention. Among them, the antennas TX1-TX8 transmit data at the same time, and the antennas RX1, RX2...RX8 receive the data sent by TX1-TX8 at the same time. In this way, the frequency response matrix of each sending channel and receiving channel can be obtained at the same time with only one sending without repeated switching of the switch. Compared with the traditional calibration scheme, the calibration method provided by the present invention sends and receives calibration data at the same time, avoids switching, solves the time jitter problem caused by frequent switching, and improves measurement accuracy.

[0041] On the other hand, considering that multiple concurrent detectio...

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Abstract

The present invention discloses a method for calibration facing parallel multi-channel wireless channel measurement, and a calibration system for realization of the calibration method. In the calibration method, a calibration receiving channel and a calibration sending channel are respectively added at a sending terminal and a receiving terminal. In the calibration process, a radio frequency line is directly communicated to the sending terminal and the receiving terminal, the calibration receiving channel and the calibration sending channel are disconnected and the response features of a passive device are tested; in the measurement process, the sending terminal is disconnected with the receiving terminal, the calibration receiving channel is connected with the calibration sending channel, and the calibration receiving channel / the calibration sending channel are employed to match measurement channels to calibrate the channel response features of the sending terminal and the receiving terminal. According to the invention, the method and system for calibration facing parallel multi-channel wireless channel measurement can perform real-time online supervision of the channel response features among multiple channels at the current moment to ensure that the measurement errors caused by mutual interference and influence among multiple channels can be avoided in the channel measurement process.

Description

technical field [0001] The invention relates to a calibration method for parallel multi-channel wireless channel measurement, as well as a calibration system for realizing the calibration method, and belongs to the technical field of communication testing. Background technique [0002] In existing communication test technologies, the calibration scheme for parallel multi-channel wireless channels is basically evolved from the calibration scheme for single-channel scenarios. The calibration scheme relies on multiplexing switches to switch between multiple channels to achieve multi-channel calibration and measurement. Only one channel is measured at the same time, so it is essentially a time-division-based measurement calibration scheme. In this calibration scheme, the measurement signals do not need to be orthogonal to each other, so the structure is relatively simple and the system implementation cost is low. In addition, the number of antennas at the transceiver end can be...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/14H04B17/21H04B17/30H04B1/7113
CPCH04B1/7113H04B17/14H04B17/21H04B17/30H04B17/0085H04J13/004H04W56/001H04W56/0065H04B1/69H04J13/18H04J2013/0096
Inventor 蔡仲斐桂云松王浩文周明拓杨旸王海峰秦伟伦
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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