Maximumpower and amplitudeequalizing algorithms for phase control in space diversity combining
Abstract
Two phase control algorithms for space diversity combining are analyzed, comparing the performance capabilities of a maximumpower and an amplitudeequalizing algorithm. The conventional maximumpower combiner is reviewed, describing in detail a particular implementation of the maximumpower phasecontrol algorithm. It is shown how the maximumpower algorithm can be converted into an equalizing algorithm by judiciously extracting a phasecontrol signal from selected portions of the combinedsignal spectrum. The analysis reveals that the maximumpower algorithm is only a special case of a more general algorithm that can adaptively maximize the combined signal power over any frequency interval in the channel. The results of computer simulations illustrating the response of the maximumpower and equalizing combiners to dispersive channel conditions are presented. An improvement factor of the equalizing combiner over the maximumpower combiner is calculated for several assumed probabilitydensity functions of the parameters of a tworay fading model.
 Publication:

AT T Technical Journal
 Pub Date:
 January 1983
 Bibcode:
 1983ATTTJ..62...63K
 Keywords:

 Amplitude Distribution Analysis;
 Microwave Transmission;
 Phase Control;
 Pulse Communication;
 Reception Diversity;
 Signal Processing;
 Algorithms;
 Channels (Data Transmission);
 Equalizers (Circuits);
 Microwave Antennas;
 Multipath Transmission;
 Power Gain;
 Probability Density Functions;
 Signal Fading;
 Communications and Radar