Noise power estimation method and device
A noise power and power technology, which is applied in the field of noise power estimation methods and devices, can solve problems such as abnormal negative values and unstable noise power estimation results, and achieve the effect of stable and reliable noise power and avoid abnormal negative values
Active Publication Date: 2018-11-02
DATANG MOBILE COMM EQUIP CO LTD
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[0012] Embodiments of the present invention provide a method and device for estimating noise power to solve the problems in the prior art that the estimation result of noise power is unstable and prone to abnormal negative values
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Embodiment Construction
[0059] In order to solve the problem that the noise power estimation result in the prior art is unstable and prone to abnormal negative values, in the embodiment of the present invention, a noise power estimation method is redesigned. The method is to determine the modulation signal mapped to the frequency Several frequency domain signals corresponding to each symbol group after the domain, and based on the frequency hopping characteristics between each symbol group, determine the equivalent signal power corresponding to the modulated signal, and based on the signal power of each frequency domain signal, determine the corresponding signal power of the modulated signal The total signal power, and based on the equivalent signal power and the total signal power, determine the corresponding noise power.
[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the ...
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The invention relates to the technical field of mobile communication, and in particular relates to a noise power estimation method and a noise power estimation device, for solving the problem that inthe prior art, a noise power estimation result is instable and easy to have an abnormal negative value. The method comprises the steps of firstly determining multiple frequency domain signals corresponding to each symbol set after a modulation signal is mapped to a frequency domain, based on frequency hopping characteristics of each symbol set, determining equivalent signal power corresponding tothe modulation signal, based on the signal power of each frequency domain signal, determining overall signal power corresponding to the modulation signal based on the signal power of each frequency domain signal, and determining the corresponding noise power based on the equivalent signal power and the overall signal power. The overall signal power is formed by directly combining the signal powersof all frequency domain signals, the situation that the overall signal power is lower than the effective signal power due to the fact that the overall signal power is affected by unsatisfactory denoising effect in the symbol set is avoided, and thus the situation that the noise power has the abnormal negative value is avoided, and the noise power is more stable and reliable.
Description
technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method and device for estimating noise power. Background technique [0002] Random access is a very important process for establishing uplink synchronization and connection between user terminals and base stations in mobile communication systems. In Narrow Band Internet of Things (NB-IoT), a narrow physical random access channel (Narrow The Physical Random Access Channel (NPRACH) occupies one subcarrier, and the base station can use up to 48 subcarriers with a bandwidth of 3.75KHz. Therefore, the base station can accommodate up to 48 user terminals at the same time. [0003] Before sending a valid signal to the base station through NPRACH, the user terminal will first send a preamble (Preamble) signal. After the Preamble signal is sent, it will immediately send a valid signal. For details, refer to figure 1 As shown, a Preamble signal is composed of 4 symb...
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Login to View More IPC IPC(8): H04B1/715H04B1/7176H04B1/719
CPCH04B1/715H04B1/7176H04B1/719H04B17/309H04B17/382
Inventor 修凯
Owner DATANG MOBILE COMM EQUIP CO LTD