| Description |
v, 88, A5 leaves : illustrations ; 29 cm |
| Summary |
"A receiver design analysis and rationale is presented. The receiver is capable of performing in an instrumentation role for propagation experiments conducted in the field. The data gathered during the field tests will be used to determine the complex impulse response of the ground-to-ground communications channel and to evaluate the performance of a candidate ranging waveform in this channel. The receiver is capable of operation in either the propagation mode or the ranging mode and each mode of operation can be performed on either a UHF band frequency or an L-Band frequency. During the propagation mode the receiver serves as a quadrature envelope detector providing two baseband signal components for sampling and recording purposes. These signal components are recorded for further processing by digital computer. During the ranging mode the receiver performs as a tapped delay line matched filter providing as an output the envelope of the cross-correlation of the receiver transfer function and the received waveform. This output is used for threshold crossing in order to make range measurements and is also sampled and recorded for further processing by computer"--Abstract, leaf ii. |
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