A reconfigurable linear feedback shift register (LFSR) for the Bluetooth system

Author

Kitsos, P. ; Sklavos, N. ; Zervas, N. ; Koufopavlou, O.

Author_Institution

Dept. of Electr. & Comput. Eng., Patras Univ., Greece

Volume

2

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

991

Abstract

The Bluetooth Encryption/Decryption algorithm demands Linear Feedback Shift Registers (LFSRs) in order to reduce the length of the encryption key. A typical implementation needs sixteen different LFSRs. In this paper a low power 128-bit LFSR for efficient use in portable Bluetooth telecommunication systems is proposed. The new LFSR design techniques can be also useful in any reconfigurable LFSR. Two methods to reduce the conventional LFSR switching activity are introduced. Up to 110% LFSR power consumption reduction was achieved by using the clock-gating technique and the Gray code representation. The whole LFSR design was captured by using VHDL language and for synthesis a 0.7 μm CMOS standard cell library was used

Keywords

CMOS logic circuits; Gray codes; circuit CAD; cryptography; high-speed integrated circuits; integrated circuit design; logic CAD; low-power electronics; picocellular radio; shift registers; spread spectrum communication; 0.7 micron; Bluetooth encryption/decryption algorithm; CMOS standard cell library; Gray code representation; LFSR design techniques; LFSR switching activity reduction; VHDL language; clock-gating technique; encryption key length reduction; high speed LFSR; linear feedback shift registers; low power LFSR; portable Bluetooth telecommunication systems; reconfigurable LFSR; Automatic testing; Bluetooth; Built-in self-test; Clocks; Cryptography; Design for testability; Energy consumption; Linear feedback shift registers; Payloads; Polynomials;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on

Print_ISBN

0-7803-7057-0

Type

conf

DOI

10.1109/ICECS.2001.957640

Filename

957640