Abstract:This paper shows that modulation protects a bandlimited signal against convolutive interference. A signal s(t), bandlimited to BHz, is modulated (pointwise multiplied) with a known random sign sequence r(t), alternating at a rate Q, and the resultant spread spectrum signal s(t) r(t) is convolved against an M-tap channel impulse response h(t) to yield the observed signal y(t) = (s(t) r(t)) h(t), where and denote pointwise multiplication, and circular convolution, respectively.We show that both s(t), and h(t) ca… Show more
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