No abstract

frequency-domain measurements of the channel characteristic. The equalizer is to be utilized in a data communication system as shown in Figure 1. The frequency-domain measurements are assumed to be made in an interval of 1 to 3 minutes after the channel routing has been established. An accurate computercontrolled measurement device capable of accomplishing this, assuming suitable switching automation, has been recently described by Reynolds [38]. This investigation considers the feasibility of converting such measurements into equalizer adjustment values. The method chosen for evaluating the conversion algo rithm is to simulate the equalizer and its control routine using a digital computer program. Special test cases to verify proper solution via the routine are reported, follow ed by equalization simulation results for typical channel characteristics. The effects of some implementation hardware parameters are investigated. Unique operational features of the scheme are also modeled, to establish the utility of the technique. The tapped delay line equalizer simulation model is identified as program EQLR.