Title page for ETD etd-08292008-063555


Type of Document Master's Thesis
Author Hale, Jason Matthew
URN etd-08292008-063555
Title An implementation of an AMPS digital base station with adaptive Automatic Gain Control
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Woerner, Brian D. Committee Chair
Nunnally, Charles E. Committee Member
Reed, Jeffrey Hugh Committee Member
Keywords
  • digital base station
  • quantizers
  • Automatic Gain Control
  • cellular
  • AMPS
Date of Defense 1996-05-17
Availability restricted
Abstract

We consider the problem of designing a wide-band digital receiver for an Advanced Mobile Phone Service (AMPS) cellular system, and the associated problem of choosing an appropriate Analog-to-Digital (ADC) converter. The probability density function of the voltage across a cellular receiving antenna is shown to be dependent on various cellular parameters. These parameters include mobile transmit power, mobile distance from the base station, mobile transmit frequency, and transmitting and receiving antenna characteristics. Given a high-resolution, wideband, uniform and symmetric quantizer, optimal gain factors are computed for uniformly-, sinusoidally- and normally-distributed input signals. These gain factors maximize the quantizer's Signal-to-Quantization Noise Ratio (SQNR) in a meansquare sense. Together, these techniques can be used to implement an adaptive Automatic Gain Control for cellular communications. Results from a comprehensive AMPS base station simulation will also be discussed in detail. These results illustrate several design tradeoff's including Signal-to-Noise Ratio (SNR), Carrier-to-Noise Ratio (CNR), system loading and quantizer resolution.

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