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Method for distributing forwarding time slot and selecting relay node in cooperative ultra-wide band

A relay node and time slot allocation technology, which is applied in the field of communication, can solve the problem of high collision probability of relay forwarding signals, etc., and achieve the effect of reducing the collision probability and ensuring performance gain

Inactive Publication Date: 2013-01-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of high collision probability at the receiving end of relaying and forwarding signals using existing algorithms in cooperative ultra-wideband, and to provide a forwarding time slot allocation and relay node selection method in cooperative ultra-wideband

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  • Method for distributing forwarding time slot and selecting relay node in cooperative ultra-wide band
  • Method for distributing forwarding time slot and selecting relay node in cooperative ultra-wide band
  • Method for distributing forwarding time slot and selecting relay node in cooperative ultra-wide band

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specific Embodiment approach 1

[0022] Specific implementation mode one: the following combination figure 1 , Figure 3 to Figure 5 Describe this embodiment, the method for allocating forwarding time slots in the coordinated ultra-wideband in this embodiment includes the following steps:

[0023] Step 1, each relay node in the cooperative UWB receives the pilot signal sent by the source node;

[0024] Step 2. Obtain channel gains from the source node to k relay nodes according to the pilot signal received in step 1 , where i=1,2,3...k, k≤50;

[0025] The channel gain Obtain according to the following formula:

[0026]

[0027] In the formula: Indicates the first i pulse signal received in time slots;

[0028] Indicates the first i The local template pulse signal of the relay node in time slots;

[0029] Indicates the first i The estimated value of the noise of the relay node in time slots;

[0030] Step 3. According to the k channel gains obtained in step 2, the curve of the channel gain...

specific Embodiment approach 2

[0051] Specific implementation mode two: the following combination figure 2 Describe this embodiment, based on the relay node selection method of the forwarding time slot allocation method in the cooperative ultra-wideband described in the first embodiment, it also includes the following steps:

[0052] Step 5, according to step 3, determine the small gain interval where the channel gain of each relay node is located;

[0053] Step 6, the destination node receives the signal forwarded by its corresponding relay node according to the forwarding time slot determined in step 4, and calculates the bit error rate when the signal corresponding to each time slot arrives;

[0054] The bit error rate is obtained according to the following formula:

[0055] BER = Q(SNR)

[0056] Among them, BER is the bit error rate,

[0057] SNR is the signal-to-noise ratio.

[0058] Step 7: Select the relay node corresponding to the route with the smallest bit error rate as the relay node for for...

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Abstract

The invention discloses a method for distributing a forwarding time slot and selecting a relay node in a cooperative ultra-wide band, belongs to the field of communication, and solves the problem of high conflict probability of relaying and forwarding a signal at a receiving end by adopting the conventional algorithm in the cooperative ultra-wide band. The method of the invention comprises the following steps: firstly, receiving pilot signals sent by a source node by each relay node; secondly, calculating channel gains from the source node to k relay nodes; thirdly, fitting a channel gain curve which obeys normal distribution, and dividing the interval [mu-3sigma, mu+3sigma] of the gain channel curve into N small gain intervals with the same area; and finally, distributing and forwarding time slot according to the channel gain proportional relation among the N small gain intervals. The method of the invention further comprises the following steps for selecting the relay node: fifthly, determining the small gain interval where the channel gain of each relay node is positioned according to the third step; sixthly, receiving the signal, forwarded by the relay node, corresponding to a target node by the target node according to the fourth step, and calculating an error rate; and finally, selecting the relay node corresponding to a route of which the error rate is lowest as the relay node for forwarding a data information signal.

Description

technical field [0001] The invention relates to a forwarding time slot allocation and a relay node selection method in cooperative ultra-wideband, and belongs to the communication field. Background technique [0002] In recent years, ultra-wideband technology has become one of the candidate technologies for short-distance wireless interconnection and wireless sensor networks due to its advantages such as low power spectral density and high multipath resolution. In order to avoid interference with existing systems, the US Federal Communications Commission In 2002, the "First Report and Order" on ultra-wideband technology was released. While allowing the commercial application of ultra-wideband technology, it also issued the Effective Isotropic Radiated Power (Effective Isotropic Radiated Power) of ultra-wideband transmitters in indoor and outdoor applications. , EIRP) have made strict restrictions. Among them, the peak EIRP at the operating frequency band of the UWB transmit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/7163
Inventor 吴宣利沙学军沈清华石硕林迪邱昕姜来为
Owner HARBIN INST OF TECH