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Channel estimation method of amplify-and-forward repeater adopting wireless energy collection

A technology of amplification and forwarding and channel estimation, which is applied in channel estimation, radio transmission system, baseband system, etc., and can solve the problems of lack of estimation methods

Inactive Publication Date: 2018-11-27
国网新疆电力有限公司信息通信公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the prior art lacks a channel estimation method for amplifying and forwarding relays using wireless energy harvesting. The present invention provides a method for amplifying and forwarding relays using wireless energy harvesting based on linear minimum mean square error channel estimation method

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  • Channel estimation method of amplify-and-forward repeater adopting wireless energy collection
  • Channel estimation method of amplify-and-forward repeater adopting wireless energy collection
  • Channel estimation method of amplify-and-forward repeater adopting wireless energy collection

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Experimental program
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specific Embodiment approach 1

[0044] Specific implementation manner 1: This implementation manner is a channel estimation method for amplifying and forwarding relay using wireless energy harvesting, which includes the following steps:

[0045] Step 1: Establish a Jakes model of time-varying Rayleigh fading;

[0046] Step 2: Determine the energy collection strategy adopted by the amplifying and forwarding relay, the strategy including a time allocation strategy and a power cutting strategy;

[0047] Step 3: Use the linear minimum mean square error theory at the relay and the destination to calculate the channel gains from the source to the relay link and the relay to the destination link in the two strategies for specific energy harvesting strategies . Specifically:

[0048] a, calculate the channel gain autocorrelation function The calculation formula is:

[0049]

[0050] The J 0 (x) is the zero-order Bessel function of the first kind; the f is the carrier frequency; the T s Is the symbol interval; the fT s Assi...

specific Embodiment approach 2

[0055] Specific embodiment 2: This embodiment is a further limitation of the first embodiment, and the step b also includes:

[0056] If the amplifying and forwarding relay adopts the energy collection strategy of time distribution, then:

[0057] Calculate the correlation vector r 1 , The r 1 The l-th element of is: The P 1 Is the transmission power of the source, assigned a value of 1;

[0058] Calculate the autocorrelation matrix R 1 , The R 1 The first (l 1 ,l 2 The elements of) are:

[0059]

[0060] The δ(x) is the Dirac pulse function; the Is the variance of the additive white Gaussian noise, Assign a value of 1;

[0061] Calculate the correlation vector r 2 , The r 2 The l-th element of is: The E{|h 1 (m)|}In the time-varying Rayleigh fading model: For any m, Said η is the conversion efficiency of the energy harvester and is assigned a value of 1;

[0062] Calculate the autocorrelation matrix R 2 , The R 2 The first (l 1 ,l 2 The elements of) are:

[0063] The E{|h 1 (m 1...

specific Embodiment approach 3

[0065] Specific embodiment 3: This embodiment is a limitation of the second embodiment, and the step b also includes:

[0066] If the amplifying and forwarding relay adopts the energy harvesting strategy of power cutting, then:

[0067] Calculate the correlation vector r 1 , The r 1 The l-th element of is:

[0068] The said ρ is the power cutting factor, which is assigned a value of 0.3 according to the simulation experiment; the P 1 Is the transmission power of the source, assigned a value of 1;

[0069] Calculate the autocorrelation matrix R 1 , The R 1 The first (l 1 ,l 2 The elements of) are:

[0070] The δ(x) is the Dirac pulse function; the Is the additive white Gaussian antenna noise with zero mean n 1a (k) variance; said Is the additive white Gaussian transition noise with zero mean n 1d (k) variance, assignment

[0071] Calculate the correlation vector r 2 , The r 2 The l-th element of is:

[0072] Said Approximately with scale parameters in the time-varying Rayleigh fad...

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Abstract

The invention discloses a channel estimation method of an amplify-and-forward repeater adopting wireless energy collection. The channel estimation method comprises the following steps: establishing atime-selective Rayleigh fading model; calculating channel gains from two strategy lower information sources to a repeater chain and from the repeater to a destination chain on a repeater and a destination by adopting a linear minimum mean square error theory. By adopting the method disclosed by the invention, the technical problems in the prior art that the channel estimation method of the amplify-and-forward repeater adopting the wireless energy collection is lacked are solved; a channel estimation value can be rapidly and accurately obtained, and the calculation is accurate and effective.

Description

Technical field [0001] The invention relates to the field of wireless energy harvesting, and in particular to a channel estimation method for amplifying and forwarding relay using wireless energy harvesting. Background technique [0002] Wireless relay is an effective way to extend transmission range or increase base station network coverage without additional infrastructure. A commonly used wireless relay protocol is amplification and forwarding, in which the relay node receives the signal from the source, and then simply amplifies it before forwarding it to the destination without further processing. An important problem of the traditional amplify and forward relay protocol is that the relay node must consume its own energy to amplify and forward the signal source. This is undesirable in some applications. For example, a relay node is a peer user who relies on battery operation in the same network, and the relay operation will make the battery drain faster. To solve this prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04B7/155
CPCH04B7/15542H04L25/0202H04L25/0224H04L25/0256
Inventor 李路民赵明君周文婷甄琦曾山李杰李光祖李庆马斌曹宁毛明禾
Owner 国网新疆电力有限公司信息通信公司
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