2.4 GHz Chirp发射机射频前端的设计与实现
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摘要
为了能在2.4GHz频段实现有效通信,将Chirp扩频技术应用于2.4GHz ISM频段,利用其良好的抗噪性能,设计了多带Chirp发射机。同时,研究了Chirp发射机射频前端的参数指标和制作要点,并使用ADS对系统方案进行了增益预算仿真。在单个子带通信时对系统性能进行了测试,结果表明,设计的发射机射频前端发射功率为15dBm,带内平坦度小于1dB,杂散及谐波抑制度好,满足视距高速无线数据传输的要求。
Chirp spread spectrum technology is used to communicate in the 2.4GHz ISM band for its good noise performance.The multi-band RF front-end solution is designed.The solution is simulated with ADS.Key points in producing the RF front-end are discussed.Test patterns of the designed transmitter show a flatness in-band is less than 1dB,transmission power is 15dBm.The transmitter can meet the requirement of line-of-sight high-speed wireless data transmission.
Chirp spread spectrum technology is used to communicate in the 2.4GHz ISM band for its good noise performance.The multi-band RF front-end solution is designed.The solution is simulated with ADS.Key points in producing the RF front-end are discussed.Test patterns of the designed transmitter show a flatness in-band is less than 1dB,transmission power is 15dBm.The transmitter can meet the requirement of line-of-sight high-speed wireless data transmission.
引文
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[6]Pinkney J,Behin R,Sesay A,et al.High-speed DQPSK chirp spread spectrum system for indoor wireless applications[J].Electronics Letters,1998,34(20):1910-1911.
[7]Gott G,Karia A.Differential phase-shift keying applied to chirp data signals[J].Proceedings of the IEEE,1974,121(9):923-928.
[8]李建东.移动通信[M].西安:西安电子科技大学出版社,2006:94-95.
[2]Winkler M.Chirp signals for communications[C].Wescon Convention Record,1962.
[3]NanoNET TRX Transceiver(NA1TR8)Datasheet[EB/OL].[2013-03-12].http://wenku.baidu.com/view/5b4b3bc76137ee06eff91840.html.
[4]CSS Technology White Paper[R].IEEE 802.15 Working Group for Wireless Personal Area Networks(WPANs),2003.
[5]Berni A,Gregg W.On the utility of chirp modulation for digital signaling[J].IEEE Transactions on Communication,1973,21(6):748-751.
[6]Pinkney J,Behin R,Sesay A,et al.High-speed DQPSK chirp spread spectrum system for indoor wireless applications[J].Electronics Letters,1998,34(20):1910-1911.
[7]Gott G,Karia A.Differential phase-shift keying applied to chirp data signals[J].Proceedings of the IEEE,1974,121(9):923-928.
[8]李建东.移动通信[M].西安:西安电子科技大学出版社,2006:94-95.