New high performance SAW convolvers used in high bit rate and wideband spread spectrum CDMA communications system.

New high performance SAW convolvers used in high bit rate and wideband spread spectrum CDMA communications system. Research Abstract Details 

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New high performance SAW convolvers used in high bit rate and wideband spread spectrum CDMA communications system. Abstract Text:

M Hikita,C Takubo,K Asai,

New surface acoustic wave (SAW) convolver structures with high conversion efficiency and self-temperature compensation characteristics have been developed. Strong piezoelectric substrates, regardless of temperature coefficients of delay (TCD), can be used in these convolvers. New demodulation techniques using the developed SAW convolver for high bit rate and wideband spread spectrum code division multiple access (CDMA) communications have also been developed. I- and Q-channel demodulation data can be derived directly from binary phase shift keying (BPSK) or quadri-phase shift keying (QPSK) CDMA signals. In an experiment using a 128 degrees YX-LiNbO(3) substrate, CDMA signals of 9 Mbps (megabits per second) with 60 Mcps (megachips per second) spread by 13-chip Barker code and 11 Mbps with 140 Mcps spread by 25-chip Shiba's code were clearly demodulated, demonstrating the effectiveness of these techniques for use in future CDMA communications.

New high performance SAW convolvers used in high bit rate and wideband spread spectrum CDMA communications system. Publishing Authors By Initials

M Hikita,C Takubo,K Asai,

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New high performance SAW convolvers used in high bit rate and wideband spread spectrum CDMA communications system. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: IEEE transactions on ultrasonics, ferroelectrics,

VOLUME: 47

Page Numbers: 233-41

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ISSN: 0885-3010

DAY: 1

MONTH: 02

YEAR: 2000

New high performance SAW convolvers used in high bit rate and wideband spread spectrum CDMA communications system. Information

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LANGUAGE: eng

NlmUniqueID: 9882735

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Grant and Affiliation Information for New high performance SAW convolvers used in high bit rate and wideband spread spectrum CDMA communications system.

AFFILIATION: Central Res. Lab., Hitachi Ltd., Tokyo.

Country: United States

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MEDLINETA: IEEE Trans Ultrason Ferroelect

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