Compact Matched Filter for Integrand Code Using a Real-Valued Shift-Orthogonal Finite-Length Sequence
Takahiro Matsumoto · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences · 2010
In this paper, we proposed the compact construction of a matched filter for integrand code, which do not require the high-rate clock pulse in two-valued PWM (pulse width modulation) code, using a real-valued shift-orthogonal finite-length sequence, which has a sharp aperiodic autocorrelation function with zero sidelobes except at left and right shift-ends. This matched filters are implemented on a field programmable gate array (FPGA) corresponding to 400, 000 logic gates. A proposed matched filter for the sequence of length 129 can be constructed by the circuit scale of about 47% compared with conventional filter.