Method and device for measuring noise interference
A noise interference and measurement method technology, applied in electrical components, wireless communication, etc., can solve problems that affect system performance, the position of the pilot frequency is different from the data part, and the inability to accurately measure noise interference, etc., to achieve the goal of improving system performance Effect
Active Publication Date: 2011-05-18
北京万海云科技有限公司
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However, in the actual same-frequency networking of LTE, since the pilot position and the interference received by the data part may be different, the measurement based on the pilot will not be able to reflect the noise interference of the data part well, thereby affecting system performance
[0005] To sum up, the existing noise interference measurement methods cannot accurately measure the actual noise interference, which degrades the system performance
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[0029] The improved noise interference measurement technical solution provided by the present invention is based on the following analysis, and the LTE system downlink is taken as an example for illustration here:
[0030] When the interfering cell is unloaded, the SINR measured by the current pilot-based interference noise measurement algorithm will not be accurate enough, and the measured SINR will be even more inaccurate as the signal-to-noise ratio (SNR) increases. The reason is that after the actual network deployment, the symbols occupied by the pilots of adjacent cells usually do not overlap. In this way, when the adjacent cells are empty, the interference of the adjacent cells to this cell is mainly the influence of the pilots, and usually only affects the data. There is interference partially (and only interferes with the data of the pilot series), which causes the noise interference estimated based on the pilot to be inaccurate.
[0031] According to the signal chara...
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The invention discloses a method and device for measuring noise interference, relating to the technical field of mobile communications. The method comprises the following steps of measuring a noise interference power PN with a noise interference measuring method based on pilot frequency; if the transmitting power of a business data signal is not consistent with the transmitting power of a pilot frequency signal, adjusting the power of the received business data signal and the power of the received pilot frequency signal to remove the interference caused by inconsistence of transmitting powers; computing the average power of the received business data signal and the average power of the received pilot frequency signal, and obtaining the power value PI according to the difference value of the two average powers; and adding PN to PI to obtain the final noise interference power of the business data. The technical proposal of the invention can accurately measure the actual noise interference and improve system stability.
Description
technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and device for measuring noise interference. Background technique [0002] Signal to Interference plus Noise Ratio (SINR, Signal to Interference plus NoiseRatio) refers to the ratio of the strength of the received useful signal to the strength of the received noise and interference. SINR is an important parameter reflecting the channel quality. Accurately estimating SINR is a necessary condition for communication systems to perform adaptive coding modulation and power control operations. [0003] In long-term evolution (LTE) system co-frequency networking, the cell reference signal (CRS, Cell Reference Signal) has a frequency shifting (frequency shifting) scheme to avoid interference between adjacent cells, but the physical downlink shared channel (PDSCH) on the cell In this case, the channel conditions experienced by CRS and PDSCH will be different, so the...
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IPC IPC(8): H04W24/08
Inventor 丁佛金
Owner 北京万海云科技有限公司