<p> A simple and relatively inexpensive equalizer has
been developed in conjuction with a FSK modulator and
demodulator (modem) for the transmission of digital data
over time dispersive channels. </p> <p> The transmitter structure consists of a digital
modulator followed by two filters, the first of which is a
binary transversal filter (BTF), the second a conventional
two-stage R-C low-pass filter. </p> <p> In the receiver structure a phaselock loop (PLL)
is employed as a discriminator. Synchronization is achieved
with a digital phaselock loop (DPLL). Considerable attention
is placed on the error rate optimization of the receiving
structure. </p> <p> The equalizer uses binary transversal filter comprising
a tapped delay line, realized by a long string of
metal-oxide semiconductor (MOS) flipflops, with a variable
gain circuit associated with each tap in the delay line.
The operation of the equalizer is adaptive in that the tap
gains are adjusted rom the received data, consequently the tap gains are continually optimized. The algorithm employed
for setting the tap gains is simple and can be quite easily
implemented using a combination of analog and digital
techniques. </p> <p> Experimental results are presented which illustrate
the important features of the system implemented under a
variety of operating conditions. </p> / Thesis / Master of Engineering (MEngr)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/20809 |
| Date | 05 1900 |
| Creators | Tiernay, Robert |
| Contributors | Gladwin, A. S., Electrical Engineering |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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