Pseudorandom binary sequence block shifter

Details Pseudorandom binary sequence block shifter Pseudorandom binary sequence block shifter

H - Electricity

04

L

H04L 7/10 (2006.01) H03K 3/84 (2006.01) H04B 7/216 (2006.01) H04B 1/707 (2006.01)

Patent

CA 2270827

A method and apparatus for determining the state, at any time in the past, relative to a present state, of a linear feedback shift register comprises determining a an inverse transition matrix which, if multiplied by the current state in modulo- 2 arithmetic, yields the state one step into the past; and multiplying in modulo-2 arithmetic the present state of the linear feedback shift register by the inverse transition matrix N times to obtain the state N steps into the past.

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