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Unite multi-user transmission method for wireless repeater assistance multi-user access system

A wireless repeater and multi-user access technology, which is applied in the field of multi-user communication, can solve the problems of limited performance improvement and low spectrum utilization rate, and achieve the effect of improving efficiency and spectrum utilization rate

Inactive Publication Date: 2009-04-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods are relatively simple to implement, but the overall spectrum utilization of the system is not high
The literature [Y.Chen, S.Kishore, and J.Li, "Wireless diversity through network coding", in Proceedings of IEEE Wireless Communications and Networking Conference, 2006, Vol.3, pp.1681-1686.] applies XOR network coding Based on the multi-user access system assisted by wireless repeaters, the diversity capability of the system is improved, but the performance improvement of this method is limited

Method used

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  • Unite multi-user transmission method for wireless repeater assistance multi-user access system
  • Unite multi-user transmission method for wireless repeater assistance multi-user access system
  • Unite multi-user transmission method for wireless repeater assistance multi-user access system

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Embodiment 1

[0057] Embodiment 1: Exclusive OR (XOR) mode. The XOR method was proposed by the literature [Y.Chen, S.Kishore, and J.Li, "Wireless diversity through network coding", in Proceedings of IEEE Wireless Communications and Networking Conference, 2006, Vol.3, pp.1681-1686.], it The idea is to perform symbol modulation on the parallel information encoded by multiple users after the addition operation of the Galois field, such as image 3 shown. A simple example is to perform XOR operation on coded bits of two users for modulation. This is known as traditional linear network coding. This example will serve as a benchmark against which to measure the superiority of the proposed invention.

Embodiment 2

[0058] Embodiment 2: multi-user joint modulation. The idea of ​​using multi-user joint modulation is to perform joint symbol mapping on the encoded parallel information of multiple users, such as Figure 4 shown. A simple example is the joint high-order modulation of the coded bits of multiple users.

Embodiment 3

[0059] Embodiment 3: performing linear superposition on the modulated symbols of each user. The basic idea is: after each user is coded, interleaved and modulated, multiplied by a complex factor, superimposed and sent, such as Figure 5 shown.

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Abstract

The invention relates to a combined multi-user sending method of an auxiliary multi-user access system of a wireless repeater, which can improve frequency spectrum utilization of uplink multi-user access in a cellular wireless communication system. The system consists of a plurality of user terminals, a wireless repeater and a receiving device. The sending method has the following requirements: firstly, a plurality of users send signals by respective channels and the wireless repeater and the receiving device are in receiving state; and the wireless repeater carries out signal processing to the signals of a plurality of users and then sends the processed signals to the receiving device. The combined multi-user sending method of the wireless repeater comprises two types: the first types is as follows: the received signals of a plurality of users carries out linear superposition and then is amplified and is forwarded to the receiving device; and the second type is as follows: the wireless repeater carries out detection to the information of a plurality users, and if the detection is successful, the information of a plurality of users carries out multi-user combined coding and modulation and then is sent to the receiving equipment.

Description

technical field [0001] The invention is a multi-user access method applied to a wireless communication system, and belongs to the technical field of multi-user communication in wireless communication. Background technique [0002] Wireless relay can make full use of space resources and improve the spectrum efficiency of the system. The basic idea of ​​using wireless relay networking is to introduce some wireless relay nodes (RS) between the original base station (BS) and user terminal (UE), so as to improve the uniformity of radio wave distribution in the entire wireless network, so that the Spectrum utilization and power utilization are greatly improved. Traditional wireless repeaters are only used to forward information of a single user. In order to support multiple users, time division or frequency division is usually used. Such as figure 1 As shown, UE1, UE2 and RS are associated. In order to support multiple users, the traditional wireless repeater adopts the follo...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B1/707H04L1/06
Inventor 王东明尤肖虎王江舟高西奇王闻今
Owner SOUTHEAST UNIV
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