Signal to noise ratio (SNR) optimization method based on practical transmission scene
A technology of actual transmission and optimization method, which is applied in the direction of transmission monitoring, transmission system, radio transmission system, etc. It can solve the problems of not considering the difference of loss factor, only considering the line-of-sight, affecting SNR calculation, etc.
Active Publication Date: 2016-09-07
浙江乾行信息技术股份有限公司 +2
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Problems solved by technology
[0010] (1) Only the line-of-sight distance is considered, and the non-line-of-sight distance is ignored;
[0011] (2) Even if non-line-of-sight is considered, when calculating the power loss impact of non-line-of-sight on the transmission signal, it does not consider the difference in loss factor when passing through different scatterers
[0012] The existing calculation methods of received power all have an inaccurate impact on the actual power received by the user side, especially when the scene is complex and the scatterers are abundant, the impact is more serious, which in turn affects the calculation of SNR
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[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar things or things having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0035] In the wireless communication scenario, there is one line-of-sight and three non-line-of-sight multipaths at the sending end and the receiving end, of which the first warp has 3 hops and the second warp has 2 hops. The specific process of calculating the signal-to-noise ratio at the receiving end is as follows, as shown in the attached figure 1 Shown:
[0036] start;
[0037] Step 10, set i=1, 2, j=3, 2, and the corresponding loss factor of the first path is β 1,1 , β 1,2 and beta 1,3 ; The corresponding loss factor ...
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The invention provides an SNR optimization method based on a practical transmission scene. According to the method, characteristics of horizon transmission and non-horizon transmission in wireless communication are taken into full consideration, non-horizon influence is acted on the reception power in the user side via the number of paths among scatterers, the hop number of each path and different corresponding loss factors, and the SNR is improved in the user side. Via the method, relatively real channel transmission state can be obtained for different complex application scenes of wireless communication, and a more accurate SNR is obtained.
Description
technical field [0001] The invention relates to the field of wireless communication, in particular to a calculation method for receiving power and signal-to-noise ratio at a receiving end. Background technique [0002] In wireless communication, the signal-to-noise ratio (SNR) is the ratio of the average power of the signal divided by the average power of the noise within the signal bandwidth, and is an important parameter to measure the quality of a communication system. For wireless communication, SNR can be used as the basis for switching communication frequency and modulation mode. In the field of modulation and demodulation, SNR is of great significance for the successful demodulation of modulated signals. At the same time, SNR also provides important reference information for many signal processing. [0003] The calculation of SNR is inseparable from the received power. The calculation of point-to-point received power usually has the following two situations. The f...
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Login to View More IPC IPC(8): H04B17/336H04B17/327H04B7/06
CPCH04B7/0632
Inventor 廖勇樊卓宸
Owner 浙江乾行信息技术股份有限公司