• Journal of Digital Contents Society
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• 제17권3호
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• pp.173-180
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• 2016

In this paper, a design of transceiver module for real-time wire and wireless robust integrated security system to solve the problem of conventional security system and its transceiver module is proposed. The presented robust integrated security system is designed with RF control unit and wireless transceiver module. A RF controller in transceiver module works as a low-power RF transceiver system. It is designed to use specific bandwidth stored in registers and manipulate RF power of transceiver by accessing the random values of registers. Operation algorithm for RF transceiver module is also presented. The designed transceiver module and the operation algorithm are implemented and verified by experiments.

• IEMEK Journal of Embedded Systems and Applications
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• 제4권1호
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• pp.29-34
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• 2009

In this paper, we design RF transceiver architecture and building blocks for impulse radio UWB system. Impulse radio UWB signal occupies the wide frequency band which is very low transmission power. So, it can minimize the interference effect with the other system. Using UWB technology, we obtain position awareness service. Therefore, we describe the RF transceiver architecture of direct conversion receiver and define the requirement of RF transceiver. Moreover, we implement a prototype RF transceiver based on the presented standard and verify a function and performance through the wireless data communication and ranging test.

• Journal of IKEEE
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• 제12권2호
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• pp.75-80
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• 2008

There are many researches to reduce power consumption of battery-operated Transceiver for 2.4 GHz smartRF applications. However, components such as processor, memory and LCD based power managements reach the limit of reducing power consumption. To overcome the limit, this research proposes novel low-power Transceiver and transceiver Hardware Design. Experimental results in the real smartRF Transceiver show that the proposed methods can reduce power consumption additionally than component based power managements.

• Electronics and Telecommunications Trends
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• 제23권3호
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• pp.72-81
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• 2008

차세대 이동통신 서비스나 Beyond 4G 이동통신 서비스의 단말기는 유비쿼터스 정보화 사회의 도래에 발맞춰 기존의 single mode 시스템에서 탈피하여 3G LTE, Mobile WiMAX(WiBro), DMB, IEEE 802.11b/g/n 등의 다중 이동통신 서비스를 지원하는 단말기로 발전하는 추세이다. 또한 고속 데이터 전송을 위한 MIMO 및 스마트 안테나 등의 다중 접속 기능은 다중 밴드/다중 모드/다중 경로 처리 구조의 RF transceiver를 요구하고 있다. 이러한 융합 universal 단말기를 구현하기 위해서는 여러 이동통신 서비스를 지원하는 "Reconfigurability and Convergence" RF transceiver가 필요하지만 현재의 집적 기술로는 0-수 GHz에 할당되어 있는 모든 이동통신 서비스를 지원하는 단말기 구현에 제약사항이 많기 때문에 미국 및 유럽의 국외 연구기관과 기업에서는 2-3개의 선택적인 이동통신 서비스를 지원하는 RF transceiver를 개발하여 세계 시장에서 경쟁 준비를 하고 있다. 본 고에서는 차세대 이동통신 단말기의 RF transceiver 칩 셋 기술과 국내외 개발 동향에 대해 살펴보고자 한다.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• 제21권2호
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• pp.34-39
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• 2007

UWB(Ultra Wide Band) system for high speed and high accurate location has been studying actively. This paper presents the design and implementation of RF transceiver for DS-CDMA(Direct Sequence-Code Division Multiple Access) UWB device. Major components of RF transceiver such as Low Noise Amplifier(LNA) and Band Pass Filter(BPF) are designed and then fabricated to meet wideband characteristics. The RF transceiver was implemented by the use of the fabricated components and commercial devices after carrying out performance simulation. Through the performance evaluation of the UWB RF transceiver with W-CDMA signal, the approach of design, implementation and evaluation of RF transceiver which is available to DS-CDMA UWB system is verified.

• Journal of the Korea Institute of Information and Communication Engineering
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• 제13권6호
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• pp.1051-1057
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• 2009

USN(Ubiquitous Sensor Network) is used to provide many services such as bridge monitoring, cultural properties monitoring, river monitoring, protection of an old and feeble person, management and control of a city and circumstance monitoring, etc. A RF transceiver is needed for implementing USN. In this paper the implementation and the design of a RF transceiver for sensor nodes operating in 2.4GHz frequency band are presented. The design procedure of AGC, a receiver and a transmitter is described. And the performance of the implemented RF transceiver is also tested. The test results of receiver sensitivity, receiver dynamic range, frequency stability, phase noise, output power of transmitter, flatness and spectrum mask are presented.

• Journal of Advanced Navigation Technology
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• 제6권4호
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• pp.296-305
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• 2002

This paper suggests the parameters of the requirement conditions of minimum performance for a RF transceiver system design from the specifications of IEEE Std 802.11b and IEEE Std 802.11a. It has yielded the requirement conditions of minimum performance in the design process due to these parameters. A RF transceiver system is simulated by using Agilent ADS(Advanced Design System) after selecting the components of optimal conditions to fabricate the RF transceiver system. The results of both the analysis and the simulation will be used for a real wireless LAN design.

• Information and Communications Magazine
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• 제24권3호
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• pp.76-86
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• 2007

This paper describes the RF performance issues of UE RF Transceiver for W-CDMA system based on 3GPP specifications. the parameters of transmitter and receiver are derived from the viewpoint of RF performance. In order for UE to achieve high performance, the transceiver performance requirements such as ACIR, EVM, Peak Code Domain Error, spectrum emission mask, frequency error stability and TX power control dynamic range for transmitter and reference sensitivity level, blocking characteristics, noise figure, ACS, linearity, AGC dynamic range for receiver are considered. On the basis of the required parameters, the UE RF transceiver is designed and then implemented. The evaluation of RF performance is accomplished through practical test scenarios.

• ETRI Journal
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• 제40권2호
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• pp.167-179
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• 2018

This paper proposes an IEEE 802.15.4m compliant TV white-space orthogonal frequency-division multiplexing (TVWS)-(OFDM) radio frequency (RF) transceiver that can be adopted in advanced metering infrastructures, universal remote controllers, smart factories, consumer electronics, and other areas. The proposed TVWS-OFDM RF transceiver consists of a receiver, a transmitter, a 25% duty-cycle local oscillator generator, and a delta-sigma fractional-N phase-locked loop. In the TV band from 470 MHz to 698 MHz, the highly linear RF transmitter protects the occupied TV signals, and the high-Q filtering RF receiver is tolerable to in-band interferers as strong as -20 dBm at a 3-MHz offset. The proposed TVWS-OFDM RF transceiver is fabricated using a $0.13-{\mu}m$ CMOS process, and consumes 47 mA in the Tx mode and 35 mA in the Rx mode. The fabricated chip shows a Tx average power of 0 dBm with an error-vector-magnitude of < 3%, and a sensitivity level of -103 dBm with a packet-error-rate of < 3%. Using the implemented TVWS-OFDM modules, a public demonstration of electricity metering was successfully carried out.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• 제26권11호
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• pp.978-984
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• 2015

In this paper, we designed a RF transceiver operating up to 200 km operating range and 45 Mbps data rate. The RF transceiver operates in Ku band and composed of up/down converter, high power amplifier, front-end elements. To satisfy the operating range of RF transceiver, 10W power amplifier was required and realized by using GaN power amplifier. Moreover, to mitigate mutual interference for different bandwidth signals due to the adaptive transmission speed control function, SAW filter bank structure was used. To verify system requirement satisfaction AWR simulation tool was used.