单词 | FHSS (Frequency-Hopping Spread Spectrum) |
释义 | FHSS (Frequency-Hopping Spread Spectrum) A signal modulation technique employed in radio communications, FHSS transmits short bursts of data over a range of frequency channels within the wideband carrier. Each transmission is assigned a 10-bit pseudorandom binary code sequence, which comprises a series of ones and zeros in a seemingly random pattern known to both the transmitter and receiver.The original code sequence is mathematically self-correlated to yield a code that stands out from all others, at least on average. The paired transmitters and receivers recognize their assigned and correlated code sequences, which look to all others as pseudorandom noise (PN). FHSS phase-modulates the carrier wave 74570c06.qxd 9/11/07 12:21 PM Page 184 |
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