Wideband UHF ISM-band transceiver supporting multichannel reception and DSSS modulation

• Published in: 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers pp. 454 - 455
• Main Authors: van Sinderen, Jan, de Jong, Gerben W., Leong, Frank, He, Xin, Apostolidou, Melina, Subramaniyan, Harish Kundur, Rutten, Robert, Niehof, Jan, Verlinden, Jos, Wang, Hao, Hoogstraate, Anton, Kwok, Ka Chun, Verlinden, Rene, Hoogendoorn, Reinier, Jeurissen, Dennis, Salfelner, Anton, Bergler, Ewald, Velandia Torres, Javier M., Haji-Michael, Christopher J., Unterweger, Thomas, Tarvainen, Esa, Posch, Martin, Schmidt, Reinhold, Stattmann, Markus, Tyminski, Jacek, Jean, Patrick, Darfeuille, Sebastien, Aymard, Olivier, le Grontec, Alexis, Boucey, Claire, Kelma, Christophe, Monnerie, Guillaume
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.02.2013
• Subjects: Current measurement; Frequency shift keying; Radio frequency; Solid state circuits; Spread spectrum communication; Transceivers
• ISBN: 9781467345156; 1467345156
• ISSN: 0193-6530
• DOI: 10.1109/ISSCC.2013.6487812

Wireless car keys, tire pressure sensors and wireless car diagnostic systems operate in the UHF ISM-bands using FSK/GFSK or ASK/OOK modulation with data rates between 0.5 and 200Kb/s. Recently, long-range car key applications have become popular, requiring the support of longer radio links within the boundaries of legislation and battery life. BPSK DSSS modulation allows increasing the transmitter power without violating legislation on maximum transmitted power density, but at the cost of having a non-constant RF signal envelope and a larger signal bandwidth. Unfortunately both these properties are not supported by classical narrow-band FSK/ASK transceivers.