Multi-antenna codebook selection modulating method for overcoming weak scattering

一种调制方法、多天线的技术，应用在克服弱散射的多天线码本选择调制领域，能够解决抗衰落抗干扰的性能有限等问题

Inactive Publication Date: 2011-03-16
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

In the case of BICM, although bit interleaved modulation increases the time diversity of coded modulation, its anti-fading and anti-interference performance is limited because modulation diversity is not used.

Method used

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  • Multi-antenna codebook selection modulating method for overcoming weak scattering
  • Multi-antenna codebook selection modulating method for overcoming weak scattering
  • Multi-antenna codebook selection modulating method for overcoming weak scattering

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0053] The present invention is a rotation modulation method based on MIMO system, which is applicable to the channel condition of weak scattering and strong correlation, through the combination of multi-antenna codebook precoding and rotation modulation scheme through a new codebook selection criterion, the channel coding Gain and time diversity, space diversity and modulation diversity are effectively combined and jointly optimized, thereby reducing the transmission error rate and improving transmission reliability.

[0054] see figure 1 , introduce the multi-antenna codebook selection modulation method that the present invention is used in MIMO system, and this method comprises following several operation steps:

[0055] (1) The system obtains the equivalent channel response of the system downlink channel by sending the pilot signal, selects the pre...

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Abstract

The invention provides a multi-antenna codebook selection modulating method for overcoming weak scattering. A new codebook selection criterion is designed in the method so that higher diversity gain is acquired by combining multi-antenna codebook pre-coding and rotating modulation schemes. The higher diversity gain is acquired by the design scheme of designing high-order modulation diversity and a space interweaver. In addition, in order to achieve higher space diversity gain, the number Nt of transmitting antennas is set to be equal to a rotating modulation dimension D. Therefore, signals ofeach dimension after D-dimensional rotation are uniformly scattered on the antennas by space interweaving technology so that the signals of each dimension are subjected to different fading and the data of a transmitting end are pre-coded by using a channel value of ideal channel estimation in the space diversity gain.

Description

technical field [0001] The present invention relates to a modulation method in a digital communication system, in particular to a method suitable for channel conditions of weak scattering and strong correlation, through the combination of multi-antenna codebook precoding and rotational modulation scheme through a new codebook selection criterion, so that The invention relates to a modulation method in which channel coding gain is effectively combined and jointly optimized with time diversity, space diversity and modulation diversity. It is a modulation method under a codebook precoding-based MIMO system with high efficiency and high spectrum efficiency, and belongs to the field of communication technology. Background technique [0002] With the development of cellular mobile communication, Internet and multimedia services, the demand for capacity of wireless communication in the world is increasing rapidly. On the other hand, the available wireless spectrum is limited. If th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
CPCH04B7/0456H04B7/0697H04L1/0071H04L25/03898H04B7/0473H04L1/0625H04L25/0204H04B7/0639
Inventor 吴湛击张力岭王文博
Owner BEIJING UNIV OF POSTS & TELECOMM
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