Title page for ETD etd-3014171099642831

Type of Document Master's Thesis
Author Li, Guoliang
URN etd-3014171099642831
Title Physical Layer Design for a Spread Spectrum Wireless LAN
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Midkiff, Scott F.
Woerner, Brian D.
Sweeney, Dennis G. Committee Chair
  • wireless LAN
  • spread spectrum
  • radio transceiver
  • PN code
Date of Defense 1996-09-10
Availability unrestricted
A wireless local area network (LAN) system

is proposed to provide mobility for existing

data communication services. This thesis

presents a physical layer design for a direct

sequence spread spectrum ISM band radio

LAN system. This radio system employs

spread spectrum communication technology

and a differential binary phase shift

keying/quadrature phase shift keying

(BPSK/QPSK) non-coherent receiver to

overcome the adverse indoor wireless

environment. Moreover, a variable data rate

transmission technique is used to dynamically

configure the spread spectrum system

according to channel performance. This

physical layer incorporates the Zilog Z2000

Evaluation Board performing direct sequence

spread spectrum processing, a Grayson 900

MHz radio receiver and a transmitter module

which was designed and built at Virginia Tech.

The transmitted spectrum occupies a 4 MHz

bandwidth in the 900 MHz ISM band and this

system supports a data rate of up to 363

Kbits/sec. The spread spectrum system design

along with detailed descriptions of hardware

and control software development are


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