Analysis, Design, and Test of CDMA LFSR with Offset Mask Using Standard ICs

Abstract

Hardware implementation of Linear Feedback Shift Register (LFSR) plays a great and very important role in communication systems, and in many security devices. In this paper, a design of LFSR with offset mask has been presented, for Direct Sequence Code Division Multiple Access (DS-CDMA) applications. Integrated electronic components have been used. An accessible model facilitating the synthesis on Printed Circuit Boards (PCB) and implementation on Field Programmable Gate Array (FPGA) is offered. In addition, a temporal and spectral analysis of the circuit is performed in order to validate the design. This latter facilitates the generation of pseudo-random codes based on LFSR and their integration into electronic systems.

Implementation and performance evaluation of multi level pseudo random sequence generator

“…PN is a sequence of binary values, such as ±1, that looks to be random but is actually absolutely deterministic and periodic, LFSR are commonly used to create PN sequences [21]. The number of shifts register stages determines the length of the PN sequence.…”