High-frequency-amplification station for supporting time division duplex operation mode in orthogonal frequency division multiplexing system

An orthogonal frequency division and time division duplex technology, which can be applied to orthogonal multiplexing systems, time division multiplexing systems, multi-frequency code systems, etc. The effect of improving coverage and reducing network construction costs

Inactive Publication Date: 2006-03-01
ZTE CORP
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  • Abstract
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  • Claims
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Problems solved by technology

And the transmitter power of the base station and the terminal cannot be made infinite, which also limits the coverage of these signals

Method used

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  • High-frequency-amplification station for supporting time division duplex operation mode in orthogonal frequency division multiplexing system
  • High-frequency-amplification station for supporting time division duplex operation mode in orthogonal frequency division multiplexing system
  • High-frequency-amplification station for supporting time division duplex operation mode in orthogonal frequency division multiplexing system

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Embodiment Construction

[0033] In order to adapt to the transmission signal of the base station in the OFDM access system working in TDD mode, the key is to know the switching point moment of TTG and RTG, and to know the duration of TTG and RTG. In this way, the uplink and downlink amplification links in the data forwarding device, that is, the repeater, can be switched on time, the downlink and uplink signals are time-divisionally amplified, and the uplink and downlink amplifying links are effectively isolated without causing interference and Self-excited.

[0034] In order to solve the appeal problem, the first embodiment of the present invention is as follows Figure 6 shown. exist Figure 6 Among them, it is divided into two amplification links, downlink and uplink, wherein downlink low noise amplifier 42, downlink bandpass filter 43 and downlink power amplifier 44 form a downlink amplifying link; uplink low noise amplifier 47, uplink bandpass filter 48 and uplink The power amplifier 49 forms ...

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Abstract

A straight amplifying station supporting time - division duplex mode in orthogonal FDM system consists of down - link amplifying unit for receiving down link signal from base station and amplifying it to send it to terminal, up - link amplifying unit for receiving up link signal from terminal and amplifying it to send it to base station, radio frequency switch circuit for switching over up - link and down link amplification, unit for changing over time of up link and down link signal to let signal amplification at amplifying station synchronize strictly to time of receiving and emitting signal at base station.

Description

technical field [0001] The invention relates to a data forwarding device, in particular to a data packet forwarding device working in a TDD (time division duplex, time division duplex) mode in a wireless communication system using OFDM or OFDMA technology. Background technique [0002] Orthogonal frequency division multiplexing technology began to be used in the military field in the 1960s, and gradually applied to the civilian field after the 1970s. This modulation method has a high spectrum utilization rate and is suitable for use in the field of wireless data transmission. [0003] For the transceiver structure of a traditional OFDM (orthogonal frequency division multiplexing) system using a digital modulation technique, see figure 1 , which uses digital modulation, such as QPSK (quadrature phase-shift keying - quadrature phase-shift keying), QAM (quadrature amplitude modulation - quadrature amplitude modulation), PAM (pulse amplitude modulation), etc., of course, can al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/145H04J3/00H04J11/00H04L27/26
Inventor 王雪松吴岩巍
Owner ZTE CORP
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