Please use this identifier to cite or link to this item:
http://hdl.handle.net/11375/19624
Title: | Optimal Detection and Estimation for Echo Ranging in a Randomly Fading Environment |
Authors: | Mark, Jon Wei |
Advisor: | Sinha, N. K. |
Department: | Electrical Engineering |
Keywords: | optimal, detection, estimation, echo, fading, environment, a posteriori, binary |
Publication Date: | Mar-1968 |
Abstract: | <p> A self-synchronized echo ranging system with optimum utilization of signal estimation and detection strategies has been designed and simulated. A binary convolution code has been utilized to modulate the transmitter signal. The random medium is modelled by a vector sum of a fixed and a random component; the medium fading process has a Rician distribution density. A channel estimator has been derived using a maximum a posteriori probability criterion. The estimator is an adaptive processor whereby the variance of the medium fading process is recomputed during each updating cycle. The estimator attempts to provide a coherent input to the correlator. An optimum processor for the signalling described is an ordered serial estimator-correlator combination. It is conjectured that the estimator offers an improvement in signal processing gain of approximately 5 dB over and above the non-optimized system. Accompanying this is an improvement in peak-to -sidelobe ratio and in false alarm probability. A 3 bit (8 level) quantized system is conjectured to be a 'good' trade-off between degradation in system performance and simplification in system implementation.</p> |
URI: | http://hdl.handle.net/11375/19624 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Mark_Jon_W._1968Mar_Masters..pdf | 4.51 MB | Adobe PDF | View/Open |
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