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A Relay Selection Method Under Non-ideal Conditions

A non-ideal and conditional technology, applied in the field of relay selection under non-ideal conditions, it can solve problems such as distortion, inability to obtain channel state information, and no consideration of system problems, so as to improve the performance of interruption probability, improve feasibility and versatility. strong effect

Active Publication Date: 2020-05-08
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0003] There are at least the following problems in the prior art: the relay selection strategy under ideal conditions does not consider the problems faced by the actual system, in the actual communication system, there are distortion problems caused by non-ideal hardware, and the failure to obtain ideal channel state information Happening

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  • A Relay Selection Method Under Non-ideal Conditions
  • A Relay Selection Method Under Non-ideal Conditions
  • A Relay Selection Method Under Non-ideal Conditions

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0039]The present invention is applicable to any fading channel, such as Rayleigh, Rice, Nakagami-m, Weber, α-μ and other fading channels. In order to make it universal, the fading channel given in this embodiment is an α-μ fading channel, where α and μ are channel fading parameters. By setting different parameters, the α-μ distribution can be characterized as a variety of fading distributions, For example Rayleigh (α=2, μ=1), Rice (α=2, μ=2), Nakagami-m (α=2, μ=m), Weber (μ=1).

[0040] Such as figure 1 As shown in , a flow chart of a relay selection method under non-ideal conditions, this method will consider both hardware damage and non-ideal channel state information for relay selection, making the relay selection method more suitable for practical systems,...

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Abstract

The invention belongs to the wireless communication technical field and relates to a relay selection method applied to non-ideal conditions. According to the method, a relay network-based generalized damage model is established, so that the input and output model of a system is obtained; transmitting end and receiving end distortion parameters are obtained; channel estimation error is obtained through a channel estimation algorithm, and the input and output model of the system is further obtained; on the basis of the input and output model of the system, receiving end receiving signal-to-noise and distortion ratios of two time slots are calculated respectively through using the definition of the signal-to-noise and distortion ratio; and optimal relay is obtained through using a maximized minimum signal-to-noise and distortion ratio relay selection method according to the receiving end receiving signal-to-noise and distortion ratios of the two time slots; and the outage probability performance of the system is calculated according to the definition of relay probability. With the method of the invention adopted, the technical problems of non-ideal hardware damage and incapability of obtaining ideal channel state information in an actual communication system can be decreased.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a relay selection method under non-ideal conditions. Background technique [0002] Relay communication has attracted extensive attention due to its ability to extend network coverage and improve system throughput. Relay selection is an effective method to increase system capacity, how to select a relay has become a problem worthy of attention. In recent years, many literatures have studied relay selection strategies, but most relay selection strategies are based on ideal hardware and ideal channel state information. However, in practical systems, due to the low price of relays, they are widely used in practical communication systems. In practical relay networks, radio frequency equipment receives nonlinear power amplifiers, in-phase and quadrature phase imbalances, phase noise, and quantization errors. Effects of non-ideal hardware impairments. Although the abov...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/40H04B17/391H04B17/336
CPCH04B17/336H04B17/3911H04B17/401
Inventor 李兴旺李静静邓超王俊峰王小旗
Owner HENAN POLYTECHNIC UNIV