Method and apparatus for receiving and converting spread spectru

Details Method and apparatus for receiving and converting spread spectru Method and apparatus for receiving and converting spread spectru

1997-11-06

2000-03-14

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375316, H04B 169

Patent

active

060382481

ABSTRACT:
A method and apparatus for receiving and converting spread spectrum signals is disclosed. The method and apparatus allow the receiving of spread spectrum signals and different frequency bands substantially simultaneously on the same chain of hardware components. The received signals are processed on the chain of hardware components and the resulting signal thereafter can further be used within an electronic circuit. The method includes the steps of converting analog signals into a lower frequency digital signal. The conversion step includes capturing a plurality of incoming signals within a predetermined spectral range, filtering out of the incoming signals a first plurality of analog spread spectrum signals in a plurality of analog spread spectrum signals in a plurality of predetermined bands with predetermined widths, and sampling the analog signals with a sampling frequency F.sub.s wherein F.sub.s is chosen such that the resulting time-discreet signal comprises a second plurality of analog spread spectrum signals, being the first plurality of analog spread spectrum signals which have been aliased without substantial self-aliasing.

REFERENCES:
patent: 5291516 (1994-03-01), Dixon et al.
patent: 5796772 (1998-08-01), Smith et al.
Brown, A., et al. (1994) Digital Downconversion test results with a broadband L-band GPS receiver. IEEE Digital Avionics Systems Conference. 13th DASC, Phoenix, AZ, Oct. 30-Nov.; Abstract pp. 426-431.
Riley, S., et al. (1995) A combined GPS/GLONASS high percision receiver for space applications. ION-GPS, Palm Springs.
Patent Abstract of Japan for application No. 05274410 in one page.

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