Multi-point radio transmission relay system and wirless device

A wireless device and wireless transmission technology, which is applied in the field of wireless devices and wireless transmission relay systems, can solve the problem of separating and sending signals

Inactive Publication Date: 2003-07-09
HITACHI LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For similar reasons as above, h11 and h13, h11 and h21 have similar values, so it is difficult to separate the transmitted signals s1, s2 and s3 from the expressions or (4), (5) and (6)

Method used

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  • Multi-point radio transmission relay system and wirless device
  • Multi-point radio transmission relay system and wirless device
  • Multi-point radio transmission relay system and wirless device

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Embodiment Construction

[0045] Embodiments of the present invention will be described with reference to the accompanying drawings.

[0046] image 3 It is a block diagram of an embodiment of a wireless transponder system of the present invention. The wireless transmission relay system is composed of the following parts: a first wireless device having a transmitter 101 for performing an encoding process for adding redundancy to transmitted data in order to correct errors in the wireless communication path, and transmit the encoded Data to be distributed as signals s1, s2..., and sM corresponding to a plurality of (M) antennas; a second wireless device 301a, 301b, and 301c having a plurality of repeaters for relaying signals from the plurality of antennas and a third wireless device having a receiver 102 for receiving radio signals relayed by a plurality (N) of antennas and acquiring received data.

[0047] The signals s1, s2, ..., and sM are stored as z1, z2, ..., and zL in the buffers of the repeat...

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PUM

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Abstract

A communication system having an excellent communication path capacity characteristic even in an insight transmission environment in which a transmitter and a receiver can see each other directly in an MIMO communication system and a wireless communication device for the communication system, including: a wireless device having a transmitter for distributing transmission data including encoded data and a training signal to a plurality of antennas, and transmitting the data as radio signals from the plurality of antennas at a predetermined timing; a plurality of wireless devices having repeaters each for receiving the radio signal, storing the radio signal into a buffer so that the radio signal is delayed by predetermined time, and transmitting the radio signal delayed; and a wireless device having a receiver for receiving the radio signals from the plurality of second wireless devices by a plurality of antennas and demodulating the encoded data by using the training signal multiplexed on the received radio signal. Each wireless device determines whether relaying operation is necessary or not and transmits a control signal for controlling the relaying operation.

Description

technical field [0001] The invention relates to a wireless transmission relay system and a wireless device applied to the system. More particularly, the present invention relates to a wireless transmission relay system in which a plurality of repeaters are provided between a transmitter and a receiver in a wireless transmission relay system such as a mobile communication system, and applied to the system wireless device. Background technique [0002] In a common mobile communication system, in order to enhance the receiving sensitivity of the radio signal transmitted from the transmitter through the transmitting antenna in the receiver, the existing method is to use two receiving antennas and use a radio with a higher signal / noise ratio (S / Selective diversity reception of received signals of the antennas of N) and composite diversity reception of adding signals from the two reception antennas according to the signal / noise ratio. In 3GPP (Third Generation Partnership Proje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/24H04B7/06H04B7/15H04B7/155
CPCH04B7/0669H04B7/2606H04B7/06
Inventor 玉木刚酒井克巳矢野隆
Owner HITACHI LTD
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