Programmable Orthogonal Frequency Coded SAW Correlator Filters
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Programmable surface acoustic wave (SAW) correlator filters are demonstrated for use with simultaneous transmit and receive (STAR) radios. Programmable binary phase shift keying (BPSK) is implemented using electronic switches in conjunction with fixed OFC codes. The prototype devices presented have moderate insertion loss, but using methods previously demonstrated, insertion loss can be reduced to make programmable correlator filters that are useable in practical communication systems.