Ideally code patterns should be orthogonal perfect

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Unformatted text preview: patterns should be orthogonal: Perfect orthogonality not possible, undesired signals contribute some interference. Frequency-hopping CDMA - frequency hopping according to some code pattern. 802.11 - IEEE wireless standard for short range communications. It uses direct sequence or frequency hopping. Frequency hopping - 79 1 mhz channels. Direct sequence - L = 11-bit chipping sequence. Mostly for very short range. Communication Satellites Satellites receive signals from earth in a certain frequency band, retransmit in a different frequency band. Most common is the Geostationary Orbit A satellite has multiple transponders in separate sub- bands. Also Orbiting Satellites - medium and low orbits....
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