A Link Adaptive Transmission Method Based on Statistical Parameters of Signal-to-Noise Ratio
A technology of link adaptation and transmission method, which is applied in the field of link adaptive transmission based on statistical parameters of signal-to-noise ratio, can solve problems such as the fusion of two types of link adaptation technologies, and achieve good adaptability, flexibility, and optimal The effect of transmission performance
Inactive Publication Date: 2017-04-05
GUANGXI NORMAL UNIV
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However, judging from the current academic and industrial research status, there is no good way to effectively integrate the two types of link adaptation technologies.
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[0022] (1) Definition of statistical parameter of signal-to-noise ratio
[0023] The adaptive communication system adopts N kinds of QAM modulation methods, and the number of QAM modulation stages M∈{4,...,4 N}, gamma i (i=1,2,...N+1) is an adaptive threshold, and i and N are positive integers greater than 0.
[0024] A. When the mobile communication system transmits continuous pilot (or reference) signals, define:
[0025] (1) When i=1,2,...N+1, the pass rate on the signal-to-noise ratio is the signal-to-noise ratio curve of the communication signal passing through the adaptive threshold γ in the unit measurement time i The number of times, the pass rate under the signal-to-noise ratio is the signal-to-noise ratio curve of the communication signal passing through the adaptive threshold γ in unit measurement time i times.
[0026] (2) When i=1,2,...N, if average signal-to-noise ratio upper duration The signal-to-noise ratio curve of the communication signal within ...
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The invention discloses a link self-adaptation transmission method based on signal to noise ratio statistical parameters. The method comprises the step of selecting the link self-adaptation transmission type, modulation mode and channel coding mode according to link self-adaptation algorithms determined based on the upper signal to noise ratio passing rate, the lower signal to noise ratio passing rate, the upper average signal to noise ratio duration and the lower average signal to noise ratio duration. According to the method, the link self-adaptation algorithms which adapt to one another are applied to different scenes, and the aim of improving the communication system performance is achieved. In addition, the link self-adaptation transmission method can be implemented on the basis of existing system channel estimation, new measurement is not required to be added to the system, cost and burdens of the system are not increased, meanwhile, the method has the good adaptability and flexibility, and therefore the optimum transmission performance can be obtained by changing a parameter design optimal algorithm.
Description
technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a link adaptive transmission method based on statistical parameters of signal-to-noise ratio. Background technique [0002] The link adaptive technology in wireless communication adjusts the specific technology of signal transmission by tracking the change of wireless channel state, and improves the effectiveness of communication as much as possible while ensuring the reliability of communication. At present, link adaptation technology includes two types: fast link adaptation and slow link adaptation. Fast link adaptation mainly tracks instantaneous channel changes caused by small-scale fading, while slow link adaptation tracks large-scale channel changes. Weighted averaging over scale channel variations or small scale fading. [0003] Due to the different tracking scales, fast and slow link adaptation have their own characteristics. The advantage of fa...
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IPC IPC(8): H04L1/00
Inventor 肖琨
Owner GUANGXI NORMAL UNIV