INTRODUCTION TO CELLULAR MOBILE RADIO COMMUNICATION

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INTRODUCTION TO CELLULAR MOBILE RADIO
COMMUNICATION
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An illustration of a cellular system.
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An illustration of the cellular frequency reuse
concept.
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FDMA scheme in which different users are assigned
different frequency bands.
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TDMA scheme in which each user occupies a
cyclically repeating time slot.
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A three-sectored antenna in a single isolated
cell.
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Example of the transmission over an adding
channel, synchronous case.
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The model of uplink transmission in the DS CDMA
system.
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The model of the base station receiver of the DS
CDMA system.
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Illustration of FSK slow-frequency-hopped spread
spectrum system

• transmitted signal
• dehopped signal (4-FSK modulation)

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Illustration of FSK fast-frequency-hopped spread
spectrum system

• transmitted signal
• receiver down-converter output.

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Illustration of FH

• (a) binary FSK transmission
• (b) FH CDMA transmission with two users.

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Examples of monocycle waveforms that model pulses
in impulse radio

• Manchester pulse
• differentiated Gaussian pulse.

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1.14. Illustration of PPH CDMA transmission.
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Receiver structure for BPSK.