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Radio device

A technology for radio devices and antennas, applied in directions such as radio transmission systems, antennas, electrical components, etc., can solve problems such as large errors and achieve the effect of suppressing the deterioration of error rates

Inactive Publication Date: 2006-04-19
HERA WIRELESS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0058] However, since the time change of the actual weighting is not linear when observing the time change, there is a problem of large error in the traditional extrapolation of the weighting vector

Method used

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Experimental program
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Embodiment Construction

[0089] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0090] (Structure of generating a replica signal of the interference wave from the demodulated signal of the received interference wave)

[0091] FIG. 1 is a schematic block diagram showing the configuration of a PDMA base station radio apparatus (radio base station) 1000 for estimating weights at the time of transmission based on temporal changes in estimated response vectors.

[0092] That is, as explained below, the purpose of the radio device 1000 shown in FIG. 1 is to pay attention to the fact that the weighting of the adaptive antenna array can be uniquely represented by the response vector in each antenna element, and by estimating the time at which the response vector is received By changing the weights to indirect estimation, even in a dynamic Rayleigh channel having characteristics such as a wide angle, it is possible to suppress the deterioration of the downl...

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Abstract

A first reception circuit (SR1) separates a signal from a desired terminal among signals from an adaptive array antenna (#1 to #4), based on a reception weight vector calculated in a reception weight vector calculator (20.1). A remodulation circuit (32.1) generates a first replica signal from a signal of a demodulated desired wave. A replica generating circuit (40.1) multiplies signals from a plurality of antennas by a weight vector for an interfering wave from a second reception circuit (SR2), and generates a second replica signal corresponding to a signal from an interfering wave terminal. A reception response vector calculator (24.1) derives an impulse response of a propagation path of the signal from the desired terminal, based on the first and second replica signals.

Description

technical field [0001] The present invention relates to the structure of a radio device capable of changing antenna directivity in real time, and more particularly to the structure of a radio device for an adaptive antenna array radio base station. Background technique [0002] In recent years, in mobile communication systems, various methods for allocating transmission channels for realizing efficient use of frequencies have been proposed, and some of them have been put into practical use. [0003] 6 is a channel allocation diagram of various communication systems of Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), and Path Division Multiple Access (Path Division Multiple Access: PDMA). [0004] First, FDMA, TDMA, and PDMA will be briefly described with reference to FIG. 6 . Figure 6(a) is a diagram showing FDMA, the analog signals of users 1 to 4 are transmitted at different frequencies f 1 ~ f 4 The radio waves of the radio frequency div...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/10H01Q3/26H04B7/06H04B7/08H04J3/00H04J99/00
CPCH04B7/0842
Inventor 土居义晴北门顺岩见昌志
Owner HERA WIRELESS