Methods used in TDMA mobile communication to eliminate cochannel TDMA interferences is presented.since these methods use the spatial filtering

it is reasonable to use adaptive patterns to analyze the performance.Discussion about the performance of these methods is made from the view of adaptive patterns with methods which have close-form solutions.An actual signaling scenario is presented

and is followed by the simulation results such as adaptive patterns and the SINR of array output

using 8-element array and 4-element array.Factors which influence the effect of cochannel interference imination are discussed.