• Title/Summary/Keyword: Wireless headset

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Implementation of the wireless headset using Bluetooth (블루투스를 이용한 무선 헤드셋 구현)

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    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.7 no.6
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    • pp.1138-1145
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    • 2003
  • The Bluetooth wireless technology is the new short-range RF transmission standard for low-power, low-cost, short-range radio links between mobile devices and electric product. The technology can eliminate the confusion of cables, connectors and protocols confounding communications between devices. Mobile phones, pagers, laptops, PDAs, digital cameras and more, all now have a common structure for communicating across their product platforms. In this paper, we present the Bluetooth protocol stack and headset profiles for the communication between mobile phone and headset. And then, we construct application software which is embedded in the device that operates an application over the Bluetooth protocol stack Next we implement wireless headset using MSP430, not real time operating system.

Implementation of Headset Application Using Wireless Personal Area Network (개인 근거리 무선망을 이용한 헤드셋 Application 구현)

  • 이윤직;김학수;윤석기;전광표;조동식;이태형;최훈순
    • Proceedings of the IEEK Conference
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    • 2000.11a
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    • pp.57-60
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    • 2000
  • In this paper, we describe the implementation of Bluetooth headset. Bluetooth headset sets up link using ACL connection between headset and audio gateway, transfers 64kbps voice using SCO connection. Bluetooth headset implemented in this paper is designed with no HCI, so all protocol stack is implemented in Bluetooth module. We verify the upper layer protocol and application program using C-language modeling on Unix environment.

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Analysis on Compatibility between wireless headset and WiFi in ISM bands (ISM 대역에서 무선 헤드셋과 WiFi 간의 양립성 분석)

  • Cho, In-Kyoung;Kim, Tae-Youn;Jang, Jae-Woong;Jang, Kyung-Duk;Moon, Guee-Won
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.19 no.2
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    • pp.272-278
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    • 2015
  • This paper analyzed interference impact between wireless headset and Wireless Fidelity which get a high possibility of simultaneously operating in the Industry Science Medical(ISM) bands. Analysis methods of Minimum Coupling Loss(MCL) and Monte Carlo(MC) were applied by using the characters and parameters referenced to Institute of Electrical and Electronic Engineers(IEEE) 802.11b. The protection distance between interferer (WiFi transmitter) and victim (Wireless headset receiver) was calculated through the MCL. The protection distance was obtained for the case of single interferer, and the maximum allowable number of multiple interferers was computed according to the cell radius of a victim system to meet 5 % below of interference probability by using a statistical analysis based on the MC method. The analysis results are expected to be used as a guideline to coexist the wireless headset and low power devices in the ISM band.

Reconfigurable beam steering U-slot patch antenna with high gain for a wireless headset (무선 헤드셋용 고이득 재구성 빔 스티어링 U-slot 패치 안테나)

  • Kang, Seonghun;Yeom, Insu;Jung, Changwon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.9
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    • pp.5796-5800
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    • 2014
  • This paper presents reconfigurable beam steering patch antenna with high gain for a wireless headset. Because existing antenna for wireless communication in headsets has an omni-directional radiation pattern, it has a deleterious effect in the vicinity of the human head. To reduce this effect, this paper proposed an antenna comprised of a U-slot and manufactured on a FR-4 substrate. The antenna operating at the 2.37-2.5 GHz band used a tapered matching method to match the impedance between the feed part and patch part. To implement the beam steering capability, the antenna used two PIN diodes. Using PIN diodes, the antenna presented three states ($S_0$, $S_1$ and $S_2$) in the maximum beam directions of the YZ-plane ($0^{\circ}$, $30^{\circ}$ and $330^{\circ}$, respectively). The peak gains of the antenna in the headset were 4.22-5.15 dBi. The fabricated antenna could communicate efficiently with a wireless headset.

Performance Improvement of ANC System for Wireless Headset (무선헤드셋을 위한 능동 잡음 제거기의 성능 개선)

  • Park, Sung-Jin;Kim, Suk-Chan
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.36 no.6C
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    • pp.343-348
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    • 2011
  • This paper introduces a design for real time wireless headset using ANC (active noise control) system based on NFxLMS adaptive filter algorithm. The training time of the proposed system is significantly reduced by using the RMS delay spread of a channel as an error correction parameter, and convergence rate of the FxLMS filter has been improved with updating the coefficients of the NFxLMS filter, which we have got during the training process. Our system has shorter training time and better convergence rate at the same noise reduction level than the conventional system under real noisy environment.

Performance Evaluation of Real-time Voice Traffic over IEEE 802.15.4 Beacon-enabled Mode (IEEE 802.15.4 비컨 가용 방식에 의한 실시간 음성 트래픽 성능 평가)

  • Hur, Yun-Kang;Kim, You-Jin;Huh, Jae-Doo
    • IEMEK Journal of Embedded Systems and Applications
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    • v.2 no.1
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    • pp.43-52
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    • 2007
  • IEEE 802.15.4 specification which defines low-rate wireless personal area network(LR-WPAN) has application to home or building automation, remote control and sensing, intelligent management, environmental monitoring, and so on. Recently, it has been considered as an alternative technology to provide multimedia services such as automation via voice recognition, wireless headset and wireless camera for surveillance. In order to evaluate capability of voice traffic on the IEEE 802.15.4 LR-WPAN, we supposed two scenarios, voice traffic only and coexistence of voice and sensing traffic. For both cases we examined delay and packet loss rate in case of with and without acknowledgement, and various beacon period varying with beacon and superframe order values. In LR-WPAN with voice devices only, total 5 voice devices could be applicable and in the other case, i.e., coexisted cases of voice and sensor devices, a voice device was able to coexist with about 60 sensor devices.

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Data Processing Framework Design by Bluetooth (블루투스를 이용한 데이터 처리 프레임워크 설계)

  • Nam, Yong-su;Kim, Tae Yong
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2009.05a
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    • pp.455-458
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    • 2009
  • Bluetooth technology has been applied to mobile device, personal computers, peripherals, information and variety of consumer electronics. Not also the original Bluetooth technology must be especially focused in the application of mobile phone but applications such as wireless headsets and dial-up networking may be increased. However Bluetooth is so only focused to wireless headset application that the various software applications are presently ignored. In this paper, we propose the framework design to implement Bluetooth profile for kiosk servers, which can be used in Theater, train station, bank, government and public offices. Then mobile devices capable of processing user's input/output can be remotely accessed in these servers by using Bluetooth module and AP, although Kiosk servers are only processed user input data.

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A Study on Wireless Headset using Bluetooth (Bluetooth를 이용한 무선 헤드셋에 관한 연구)

  • Lee, Sang-Hyun;Kang Soon-Duk
    • The Journal of Information Technology
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    • v.6 no.4
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    • pp.25-33
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    • 2003
  • We analyze specific supplementation direction(Efficiency, Isolation, convenience, synthesis, variety, security) about system vulnerabilities of the NEIS(National Education Information System) in this research. The efficiency constructs parallel security vulnerabilities diagnosis system NEIS which the security problem prevents and checks.

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Development of Bluetooth Protocol Stack on Embedded System (임베디드 시스템 상에서 블루투스 프로토콜 스택 개발)

  • Lee, Sang-Hak;Chung, Tae-Choong
    • The KIPS Transactions:PartA
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    • v.11A no.2
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    • pp.123-128
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    • 2004
  • Recent advancement in RF technology and wireless communications has enabled the development of noble networks. Bluetooth that can be used in various application field is a kind of WPAN(Wireless Personal Area Network) standard that is widely known. Bluetooth enables voice and data applications to operate simultaneously. Various applications have been implemented based on standard Profiles. In this paper, we describes the development of Biuetooth network AP(Access Point) system for network connection of Bluetooth devices. Unlike headset, mouse, and keyboard, the access point should have capability to support multiple connection and stabilized network throughput. We have designed and developed the hardware system, core stack and profiles on embedded system to comply with standard specification. Our system showed compatibility and good protocol performance through testing with lots of products that is available in market.

A Study on Analysis and Improvement of Current Korean Army's Mine Detector (한국 군 운용 지뢰 탐지기 현실태 분석 및 개선 방안 연구)

  • Kim, Chi-Wook
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.13 no.5
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    • pp.229-233
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    • 2013
  • Mine detector of troops is different from other equipments. It is a base of a miner branch's combat, combat support and mission. But its notion is too obsucure and each troops' model and maker of it is so different and most of it is old type so there are a lot of malfunctions. Hence, I will define management of mine detector and figure out these days miner troops' mine detector situation. I will collect experts' opinions too. Through a discussion we could found improvement plan and develop it adequate for future operational environment. Proceeding all these courses and finally making it weaponize are the points of this writing.