Low loss SAW matched filters with low sidelobe sequences and spread spectrum applications

Takashi Shiba; Akitsuna Yuhara; Minoru Moteki; Yasuhiro Ota; Kouji Oda; Kazuo Tsubouchi

Low loss SAW matched filters with low sidelobe sequences and spread spectrum applications

Takashi Shiba, Akitsuna Yuhara, Minoru Moteki, Yasuhiro Ota, Kouji Oda, Kazuo Tsubouchi

Research output: Contribution to conference › Paper

Abstract

A 300 MHz SAW matched filter with reduced mismatch-loss and with a coded transducer by a low autocorrelation sidelobe sequence has been developed for 1 Mbps SS low power-transmission wireless communication modem. This low autocorrelation sequence of 25 chips was searched out to apply DS spreading DPSK signal. The sequence reduced output signal sidelobe 6 dB lower than 31 chip m-sequence, further obtained higher processing gain than that of Barker sequences. Furthermore, to reduce mismatch-loss in temperature stable SAW matched filters, a localized layered structure has been developed. ZnO is deposited only on the normal transducer on a ST-cut quartz substrate, reducing the mismatch-loss by 9 dB. A SS radio modem unit using this SAW matched filter shows a bit error ratio lower than 10^-4 with a low current consumption 210 mA, considering such a high data rate 1 Mbps and a low received power -100 dBm.

Original language	English
Pages	740-745
Number of pages	6
Publication status	Published - 1996 Dec 1
Externally published	Yes
Event	Proceedings of the 1996 4th International Symposium on Spread Spectrum Techniques & Applications, ISSSTA'96 - Mainz, Ger Duration: 1996 Sep 22 → 1996 Sep 25

Other

Other	Proceedings of the 1996 4th International Symposium on Spread Spectrum Techniques & Applications, ISSSTA'96
City	Mainz, Ger
Period	96/9/22 → 96/9/25

ASJC Scopus subject areas

Engineering(all)

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Shiba, T., Yuhara, A., Moteki, M., Ota, Y., Oda, K., & Tsubouchi, K. (1996). Low loss SAW matched filters with low sidelobe sequences and spread spectrum applications. 740-745. Paper presented at Proceedings of the 1996 4th International Symposium on Spread Spectrum Techniques & Applications, ISSSTA'96, Mainz, Ger, .

Low loss SAW matched filters with low sidelobe sequences and spread spectrum applications. / Shiba, Takashi; Yuhara, Akitsuna; Moteki, Minoru; Ota, Yasuhiro; Oda, Kouji; Tsubouchi, Kazuo.

1996. 740-745 Paper presented at Proceedings of the 1996 4th International Symposium on Spread Spectrum Techniques & Applications, ISSSTA'96, Mainz, Ger, .

Research output: Contribution to conference › Paper

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abstract = "A 300 MHz SAW matched filter with reduced mismatch-loss and with a coded transducer by a low autocorrelation sidelobe sequence has been developed for 1 Mbps SS low power-transmission wireless communication modem. This low autocorrelation sequence of 25 chips was searched out to apply DS spreading DPSK signal. The sequence reduced output signal sidelobe 6 dB lower than 31 chip m-sequence, further obtained higher processing gain than that of Barker sequences. Furthermore, to reduce mismatch-loss in temperature stable SAW matched filters, a localized layered structure has been developed. ZnO is deposited only on the normal transducer on a ST-cut quartz substrate, reducing the mismatch-loss by 9 dB. A SS radio modem unit using this SAW matched filter shows a bit error ratio lower than 10-4 with a low current consumption 210 mA, considering such a high data rate 1 Mbps and a low received power -100 dBm.",

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AU - Shiba, Takashi

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AU - Tsubouchi, Kazuo

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AB - A 300 MHz SAW matched filter with reduced mismatch-loss and with a coded transducer by a low autocorrelation sidelobe sequence has been developed for 1 Mbps SS low power-transmission wireless communication modem. This low autocorrelation sequence of 25 chips was searched out to apply DS spreading DPSK signal. The sequence reduced output signal sidelobe 6 dB lower than 31 chip m-sequence, further obtained higher processing gain than that of Barker sequences. Furthermore, to reduce mismatch-loss in temperature stable SAW matched filters, a localized layered structure has been developed. ZnO is deposited only on the normal transducer on a ST-cut quartz substrate, reducing the mismatch-loss by 9 dB. A SS radio modem unit using this SAW matched filter shows a bit error ratio lower than 10-4 with a low current consumption 210 mA, considering such a high data rate 1 Mbps and a low received power -100 dBm.

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