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Design and implementation of a code-phase-shift keying spread spectrum receiver employing a FPGA baseband decoder

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2 Author(s)
Chan, S.K.S. ; Dept. of Electr. & Comput. Eng., British Columbia Univ., Vancouver, BC, Canada ; Leung, V.C.M.

In this paper, we present the design of an M-ary direct sequence spread spectrum receiver employing a novel code-phase-shift keying (CPSK) signaling scheme, with each of the M signaling waveforms derived from a different phase shift of a single pseudonoise sequence. The receiver consists of an IF demodulator and a CPSK baseband decoder, implemented using discrete components and a FPGA chip, respectively. A modified double-dwell serial search scheme is used for data acquisition and tracking, and the carrier-phase synchronization is solved by a Costas loop in the IF demodulator and a double threshold detection scheme in the CPSK decoder. Measurements of receiver performance are presented and compared with theoretical calculations

Published in:

Communications, Computers and Signal Processing, 1997. 10 Years PACRIM 1987-1997 - Networking the Pacific Rim. 1997 IEEE Pacific Rim Conference on  (Volume:2 )

Date of Conference:

20-22 Aug 1997