PN Sequences By Dr. Ernest Simo 2.0 Some Useful PN Codes Properties The Property of Balance Consider the PN sequences Ci(t) and Cj(t) generated previously: Ci(t)= 1 0 0 1 1 1 0 Cj(t)= 1 0 0 1 0 1 1 It can be demonstrated that the ratio of "ones" and "zeros" in a Maximum Length PN Sequence is as follows: Number of "ones" = 2N/2 Number of "zeros" = 2N/2-1 Where N is the number of stages of the Linear Shift Register In our examples, Ci(t) and Cj(t) are generated by a three-stage Linear Shift Register. Therefore: Number of "ones" = 23/2 = 4 Number of "zeros" = 23/2-1 = 3 CODE: AN INTRODUCTION By Dr. Ernest Simo © 1999 DR. ERNEST SIMO - SPACE2000