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Incomplete-channel-state-information-based cross-layer optimization design method for multiple input and multiple output (MIMO) system

A channel state information, cross-layer optimization technology, applied in diversity/multi-antenna system, wireless communication, space transmit diversity and other directions, can solve the problem of limited system performance improvement

Inactive Publication Date: 2012-07-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] However, the existing research did not make full use of the power allocation scheme for cross-layer optimization design, which limited the improvement of system performance.

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  • Incomplete-channel-state-information-based cross-layer optimization design method for multiple input and multiple output (MIMO) system
  • Incomplete-channel-state-information-based cross-layer optimization design method for multiple input and multiple output (MIMO) system
  • Incomplete-channel-state-information-based cross-layer optimization design method for multiple input and multiple output (MIMO) system

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Embodiment Construction

[0056] The cross-layer optimization design scheme proposed by the present invention has been verified by the Matlab platform. It can be seen from the simulation results that this scheme can effectively improve the spectrum efficiency of the system. The technical scheme for specific implementation is given below:

[0057] (1) The system works in a flat quasi-static Rayleigh fading channel, then h j, i Obey the Rayleigh independent and identical distribution, namely h j, i ~CN(0,1), and And the element ε of E j, i All are independent and identically distributed complex Gaussian variables, namely ε j, i ~CN(0,1-|ρ| 2 ).

[0058] By H and The relationship of Under known conditions, Elements Obey the independent identical complex Gaussian distribution, and its mean is Variance is σ 2 =1-|ρ| 2 . From this it can be obtained: about β i based on The conditional probability density function (PDF, Probability Density Function) is

[0059] p β i | H ^ ( β...

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Abstract

The invention relates to a cross-layer optimization design method based on incomplete channel state information (CSI) and antenna transmit power allocation for a wireless space time coding multiple input and multiple output (MIMO) system. According to a power allocation algorithm, optimization aims to maximize the average spectral efficiency (ASE) of the system. In order to reduce complexity in the solution of an optimization problem, the problem is converted into the minimization of average packet error rate (PER) of the system according to a relationship between the ASE of the system and the average PER. In order to avoid the multiple iterative computation of the conventional optimal power allocation algorithm, a power allocation method based on a maximum compression signal to noise ratio is provided, and closed power allocation can be realized. By the method, the iterative computation is not required, and positive power requirements are met; and moreover, due to high proximity, performance approximate to that of the conventional optimization algorithm can be achieved, and effective compromise between the complexity and the performance is realized. A matlab simulation platform shows that the fed back incomplete CSI can be effectively used for rate and power adaptation and automatic repeat request, and the spectral frequency of the system is greatly improved.

Description

Technical field [0001] The invention belongs to the field of wireless communication, and relates to a cross-layer optimization design method for wireless communication, and more specifically to a cross-layer optimization design method based on incomplete channel state information (CSI, Channel State Information) and power allocation in a MIMO system. Background technique [0002] At present, wireless communication technology has been widely used in all aspects of social life, and the demand for capacity of various wireless communication data services has shown explosive growth, especially the increase in information throughput demand for wireless access and multimedia applications of the Internet, which has exceeded The data rate supported by the existing technology, an important technology that enables the effective increase of the data rate is to install multiple antennas at the transmitting end and the receiving end of the system, that is, the Multiple Input and Multiple Output...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04W72/08H04W72/54
CPCY02D30/70
Inventor 虞湘宾周婷婷刘晓帅殷馨陈小敏杨颖朱秋明
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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