LINEAR FEEDBACK SHIFT REGISTER: AN OVERVIEW
Abstract
Linear Feedback shift Register is a Shift Register whose input bit is a Linear Function of its previous state. The most commonly used function of single bit is XOR. The Initial value of the LFSR is called seed and the operation of the register is deterministic, the stream values produced by the register are completely determined by the current state. Seed values can never be all zeroes. The register has a finite number of possible states; it must eventually enter a repeating cycle. LFSR with a well chosen feedback function can produce a sequence of bits which appears random and which has a very long cycle. In this paper we will discuss in brief about LFSR, Types of LFSR, Advantages and Disadvantages of LFSR, Applications of LFSR & Implementation of Text Pattern Generator.References
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