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Moreover, for a given noise power spectral density (PSD), spread-spectrum systems require the same amount of energy per bit before spreading as narrowband systems and therefore the same amount of power if the bitrate before spreading is the same, but since the signal power is spread over a large bandwidth, the signal PSD is much lower — often ...
In the US, FCC part 15 on unlicensed spread spectrum systems in the 902–928 MHz and 2.4 GHz bands permits more power than is allowed for non-spread-spectrum systems. Both FHSS and direct-sequence spread-spectrum (DSSS) systems can transmit at 1 watt, a thousandfold increase from the 1 milliwatt limit on non-spread-spectrum systems.
This camera is still available through Panavision. Panaflex Gold (1976) Panaflex Gold II (1987) PFX-GII Golden Panaflex GII The Panaflex Gold II is a sync-sound 35 mm motion picture camera. It is capable of crystal sync at 24 and 25 or 29.97 frame/s, and the non-sync speed is variable from 4–34 fps (frames per second) according to Panavision ...
Although known for manufacturing their film projectors, a partnership with Canon between 1961 and 1976 offered still cameras. Many of their 35mm SLR cameras were manufactured by Canon with the Bell & Howell logo or Bell & Howell/Canon in place of the Canon branding. The firm dropped the production of movie cameras by the end of the 1970s.
Direct-sequence spread-spectrum transmissions multiply the symbol sequence being transmitted with a spreading sequence that has a higher rate than the original message rate. Usually, sequences are chosen such that the resulting spectrum is spectrally white. Knowledge of the same sequence is used to reconstruct the original data at the receiving ...
Silent speech interface systems have been created using ultrasound and optical camera input of tongue and lip movements. [3] Electromagnetic devices are another technique for tracking tongue and lip movements. [4] The detection of speech movements by electromyography of speech articulator muscles and the larynx is another technique.
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