Chapter 6

Wireless Networks and Spread Spectrum Technologies

In this chapter, you will learn about the following:

Industrial, Scientific, and Medical bands (ISM)

900 MHz ISM band

2.4 GHz ISM band

5.8 GHz ISM band

Unlicensed National Information Infrastructure bands (UNII)

UNII-1 (lower band)

UNII-2 (middle band)

UNII-2 Extended

UNII-3 (upper band)

3.6 GHz band

4.9 GHz Public Safety band Future Wi-Fi frequencies

60 GHz


Narrowband and spread spectrum

Multipath interference

Frequency hopping spread spectrum (FHSS)

Hopping sequence

Dwell time

Hop time


Direct sequence spread spectrum (DSSS)

DSSS data encoding


Packet Binary Convolutional Code (PBCC)

Orthogonal Frequency Division Multiplexing (OFDM)

Convolutional coding ...

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