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Mimo communication system having deterministic channels and method

A communication system and communication method technology, applied in baseband systems, transmission systems, digital transmission systems, etc., can solve problems such as difficulty in ensuring a deterministic channel matrix

Inactive Publication Date: 2016-11-23
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under such conditions, it is difficult to ensure a deterministic channel matrix

Method used

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  • Mimo communication system having deterministic channels and method
  • Mimo communication system having deterministic channels and method
  • Mimo communication system having deterministic channels and method

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Embodiment Construction

[0095] Exemplary embodiments of the present invention will be described with reference to formulas and drawings. Before that, the theoretical reason for the fact that the channel capacity becomes maximum in the MIMO configuration even in the case of a deterministic line-of-sight channel will be explained.

[0096] The channel capacity of the virtual orthogonal channel based on MIMO configuration is represented by the characteristic value of each path. Then, an eigenvalue analysis is performed for the configuration using two antennas. The following modeling ( figure 1The antenna configuration and label shown in ) take into account the highly sensitive displacement in the antenna direction. Although the case of using two antennas will be described for simplicity, the same calculation can be applied regardless of the number of antennas.

[0097] The propagation loss and common phase shift based on the transmitter-receiver distance R are insignificant, so these terms can be ign...

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Abstract

A MIMO communication system having deterministic channels wherein MIMO is applied to line-of-sight channels having a fixed geometrical positional relationship so as to increase the channel capacity. A line-of-sight MIMO communication system having a plurality of channels includes a channel matrix calculation processing section on a transmission or reception side or both of the transmission and reception sides. The channel matrix calculation processing section updates an orthogonal channel formation matrix in accordance with a fluctuation of a transmission antenna position or reception antenna position or a fluctuation of the channels.

Description

[0001] This application is an invention patent application with PCT international filing date of November 19, 2007, application number 200780042738.2 (PCT international application number is PCT / JP2007 / 072411), and titled "MIMO communication system and method with deterministic channels" divisional application. technical field [0002] The present invention relates to a space division multiplexing method (hereinafter, referred to as "MIMO (Multiple Input Multiple Output)"), and more particularly to a MIMO communication system applicable to a line-of-sight fixed-point microwave communication system. Background technique [0003] In recent years, techniques using MIMO, which itself is no longer new, have prevailed in wireless communications. Conventional techniques using MIMO have mainly focused on mobile communications, and applying MIMO to fixed communications has not been thoroughly examined. In mobile communication radio channels, radio waves from the transmitting antenna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04J99/00
CPCH04B7/0413H04L25/0244H04L25/0248
Inventor 丸次夫
Owner NEC CORP