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Physical layer multicast and multithread transmission method based on combined block triangularization

A multi-stream transmission and physical layer technology, applied in the field of physical layer multicast multi-stream transmission based on joint block triangulation, can solve the problems of high computational complexity, large feedback overhead, unfavorable implementation, etc., to save the number of multiplications, reduce Computational overhead, effects of good system error performance

Inactive Publication Date: 2013-07-10
UNIV OF SCI & TECH OF CHINA
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  • Description
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a physical layer multicast multi-stream transmission method based on joint block triangulation, to improve the transmission performance of the physical layer multicast link including a transmitting base station and two receiving users, and to improve the transmission performance in MIMO The existing joint triangulation decomposition algorithm in the frequency selective fading channel has high computational complexity and high feedback overhead, which is not conducive to implementation

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  • Physical layer multicast and multithread transmission method based on combined block triangularization
  • Physical layer multicast and multithread transmission method based on combined block triangularization
  • Physical layer multicast and multithread transmission method based on combined block triangularization

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Embodiment 1

[0015] Embodiment 1: Construction method of block diagonal precoding matrix

[0016] This embodiment revolves around a physical layer multicast wireless scenario including one transmitting base station and two receiving users, taking the case where a base station adopts zero-filled block data transmission based on a single carrier as an example, and specifically illustrates the use of the physical layer based on the joint block triangulation of the present invention The operation procedure of the multicast multistream transmission method.

[0017] In this embodiment, it is assumed that the base station configures the number of transmitting antennas M=2, and the number of receiving antennas of user 1 is N 1 =2, the number of receiving antennas N of user 2 2 =2, the base station sets the data block length K=4, the channel order L=1 and the base station knows that the channel matrices of the two users are

[0018] H 1 = ...

Embodiment 2

[0051] Embodiment 2: Bit Error Rate Performance Comparison

[0052] This embodiment still takes the physical layer multicast wireless scene including one transmitting base station and two receiving users as an example, and compares the adoption of the joint block triangulation-based physical layer multicast multi-stream transmission method of the present invention and the joint triangulation decomposition algorithm The resulting difference in system bit error rate performance.

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Abstract

The invention discloses a physical layer multicast and multithread transmission method based on combined block triangularization. The physical layer multicast and multithread transmission method is characterized in that a block diagonal precoding matrix of a physical layer multicast wireless scene suitable for a single launching base station and two receiving users is iterated and constructed through a combined triangularization decomposition algorithm by using of a matrix block computational thinking. Compared with an existing combined triangularization decomposition algorithm, the physical layer multicast and multithread transmission method based on the combined block triangularization can not only reduce reduce floating-point multiplication times participating in computing when the block diagonal precoding matrix is used for data transmission, but also obtain better system error code performance, is suitable for is suitable for an environment of receive-transmit antenna of a large scale and a frequency selectivity fading wireless communication channel in a system, and can be conveniently implemented in a new-generation broadband wireless and mobile communication system using a multiple-input-multiple-output technique.

Description

technical field [0001] The invention belongs to the key technical field of multiple-input multiple-output (MIMO) broadband wireless and mobile communication physical layer, and specifically relates to a new type of single-carrier broadband wireless and mobile communication system or orthogonal frequency division multiplexing ( A MIMO precoding method for transmitting multiple independent data streams in a physical layer multicast scenario in a novel multi-carrier broadband wireless and mobile communication system in the form of OFDM) transmission. Background technique [0002] How to use the wireless communication network to develop the multimedia multicast service is a practical problem that the new generation of broadband wireless and mobile communication systems generally pay attention to. Compared with the single-input single-output (SISO) transmission method, the introduction of multi-antenna transmission technology in the new generation of broadband wireless and mobile...

Claims

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Application Information

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IPC IPC(8): H04L1/06
Inventor 许小东张子龙
Owner UNIV OF SCI & TECH OF CHINA
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