High Speed and Low Power Pseudo Noise(PN) Sequence Generator

Abstract

The Pseudo Noise (PN) sequence has become a significant component in digital communication. A pseudo random code are generated using two techniques namely, gold code and Kasami code. The generation of PN sequence involves the use of Linear Feedback Shift Register (LFSR) as its building block. When compared to other multiplexing methods,gold code and Kasami code techniques are better in terms of power utilization, noise flexibility and frequency efficiency. The generation of these codes involves the use of two maximum length sequence (M-sequence). The auto-correlation properties of gold and Kasami sequences are the basis for this research work. The software used to simulate these methods is NC Launchand the language used is Verilog Hardware Description Language(HDL). The results of the above two methods are compared in terms of power utilization and speed in the CADENCE environment. When comparing Gold code with Kasami code, Gold code consumes 42% less power than the Kasami code. In the modified Kasami code generator, the speed is increased by 8%, when compared to modified Gold code generator.