Boots – shoes – and leggings
Patent
1983-11-17
1986-05-27
Harkcom, Gary V.
Boots, shoes, and leggings
364819, 333195, 310313R, G06G 7195, H03H 930, H01L 4108
Patent
active
045920095
ABSTRACT:
A surface acoustic wave (SAW) convolver is provided for use in a communication system in which a received signal incorporates a mixed pseudonoise (PN) code sequence and narrowband information signal phase-modulated thereon according to a minimum shift keying (MSK) modulation scheme. The convolver includes a piezoelectric substrate capable of propagating acoustic wave signals on the top surface thereof, and a first transducer formed on the top surface for receiving the received signal and in response thereto generating acoustic surface waves along a first direction thereof. A second transducer is also formed on the top surface for receiving a reference signal and in response thereto generating acoustic surface waves along a second direction thereof, the reference signal incorporating the PN code sequence phase-modulated thereon according to a bi-phase shift keying (BPSK) modulation scheme. A BPSK-MSK converter integrally-formed on the substrate produces the reference signal in MSK form. This structure provides a receiver having lower power consumption, fewer parts, reduced size, cost and weight and improved reliability.
REFERENCES:
patent: 4070638 (1978-01-01), Reeder
patent: 4181904 (1980-01-01), Weller et al.
patent: 4207545 (1980-06-01), Grudkowski et al.
patent: 4247903 (1981-01-01), Grudkowski et al.
patent: 4388599 (1983-06-01), Gautier et al.
patent: 4448805 (1984-05-01), Lewis
patent: 4468639 (1984-08-01), Green et al.
patent: 4473888 (1984-09-01), Smith
patent: 4485363 (1984-11-01), Hunsinger et al.
Crowder, Jr. Albert M.
E-Systems Inc.
Harkcom Gary V.
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