Unlock instant, AI-driven research and patent intelligence for your innovation.

Base station device and radio communication method

A wireless communication and base station technology, applied in the field of base station devices, can solve problems such as deterioration of reception quality and destruction of orthogonality

Inactive Publication Date: 2000-11-22
PANASONIC CORP
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In addition, in the spread spectrum communication method, if the timing adjustment amount for transmission is not made into a chip unit, the code orthogonality of the spread spectrum transmission signal is destroyed, and the reception quality deteriorates.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Base station device and radio communication method
  • Base station device and radio communication method
  • Base station device and radio communication method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] image 3 It is a block diagram showing the structure of the base station apparatus according to Embodiment 1 of the present invention. Signals received by antennas 101-103 are respectively amplified, frequency-converted, and A / D-converted by wireless receiving unit 110 as received signals 107-109 via duplexers 104-106, and taken out as baseband signals or IF signals 111-113.

[0033] This signal is sent to the timing detection unit 123 . In the timing detection unit 123, an optimum reception timing is calculated. Calculation of the optimum reception timing is performed as follows, for example. A pattern known to the transmitter and the receiver is embedded in the frame, and the data is transmitted from the transmitter. In the receiver, A / D conversion is performed with several times to ten times of 1 symbol time, and a correlation operation is performed with known symbols. Then, the time when the power of the correlation calculation result is high is detected as the ...

Embodiment 2

[0047] In the base station apparatus of Embodiment 1, transmission is performed with the directivity at which the received desired wave power is maximized. When the timing at which the required wave power reaches the maximum varies, as shown in FIG. 2 , when a reflected wave from a distant reflector arrives, the timing at which it reaches the communication partner varies. Therefore, it is difficult for the communicating party to accurately detect the timing of the received signal. Therefore, in the second embodiment, a case will be described in which the transmission is corrected so that the timing of arrival at the communication partner is constant, thereby reducing the difficulty of timing detection of the communication partner.

[0048] Figure 6 It is a block diagram showing the structure of a base station apparatus according to Embodiment 2 of the present invention. exist Figure 6 The base station unit shown, pair with image 3 The same parts as shown in the base sta...

Embodiment 3

[0061] Figure 7 It is a block diagram showing the structure of a base station apparatus according to Embodiment 3 of the present invention. exist Figure 7 The base station unit shown, pair with image 3 The same parts as shown in the base station unit are appended with image 3 The same symbols are used, and descriptions thereof are omitted.

[0062] exist Figure 7 In the shown base station apparatus, direction of arrival estimating sections 507 and 508 are provided to estimate the directions of arrival of desired waves of received signals at time t0 and time t1 selected by extraction and selection sections 114 to 116; a directivity forming section 512 is also provided. A weighting coefficient for forming directivity is calculated based on the direction of arrival of the desired signal selected by the selection unit 135 in which the reception level of the desired wave is maximized.

[0063] Next, the operation of the base station apparatus having the above configuratio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A base station apparatus of the present invention detects a timing for each incoming signal, performs adaptive array antenna reception with the timing for each incoming signal, calculates a received level of a desired signal using a power level of adaptive array antenna received result for each incoming signal, selects a weight for the adaptive array antenna received result with a higher received level of the desired signal, selects a timing of the desired signal with the higher received level, controls the transmission timing based on the selected timing, and transmits a signal with the selected weight.

Description

technical field [0001] The present invention relates to a base station device and a radio communication method in a radio communication system using a mobile phone or the like. Background technique [0002] A conventional base station apparatus in a wireless communication system will be described below. figure 1 It is a structural block diagram of a conventional base station device. Signals received from antennas 1 to 3 are input to radio receiving circuit 10 as received signals 7 to 9 via duplexers 4 to 6, respectively. [0003] The amplified, frequency-converted, and A / D-converted baseband signals or IF signals 11-13 in the wireless receiving circuit 10 are sent to the timing detection unit 16 to detect the best timing, and the detection signal 17 is sent to the adaptive array antenna for reception. machine14. In addition, baseband signals or IF signals 11 to 13 are synthesized by adaptive array antenna receiver 14 and sent to directivity formation unit 21 as synthesize...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/26H04B7/06H04B7/08H04B7/10H04B7/26
CPCH01Q3/2605H04B7/086
Inventor 平松胜彦宫和行
Owner PANASONIC CORP