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   _____   __   __    ______     ___      ______  
  / ___//  \ \\/ //  /_____//   / _ \\   /_   _// 
  \___ \\   \ ` //   `____ `   | / \ ||  `-| |,-  
  /    //    | ||    /___//    | \_/ ||    | ||   
 /____//     |_||    `__ `      \___//     |_||   
`-----`      `-`'    /_//       `---`      `-`'   
                     `-`

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Text this: IIR array processing based fast adaptive null steering algorithm using shift-invariant subarrays