VLSI design of OFDM baseband transceiver with dynamic spectrum access

Author

Hatanaka, Masahide ; Hashimoto, Ryoji ; Tatsuka, Toshimitsu ; Onoye, Takao ; Hatamoto, Hironobu ; Ibi, Shinsuke ; Miyamoto, Shinichi ; Sampei, Seiichi

Author_Institution

Dept. Inf. Syst. Eng., Osaka Univ., Suita, Japan

fYear

2010

fDate

6-8 Dec. 2010

Firstpage

1

Lastpage

4

Abstract

The VLSI design of OFDM baseband transceiver is described, which is dedicated to cognitive radio systems. To facilitate dynamic spectrum accessing, this receiver architecture employs a specialized FFT module and a mapping/demapping module. Efficient mechanisms to omit input/output of unused subrcarriers are introduced. Also, calculation of spectrum intensity for subcarrier level carrier sensing is successfully integrated to the FFT module. Whole transmitter/receiver modules are implemented by maintaining compatibility with IEEE 802.11g. Implementation results show that the proposed architecture can process OFDM symbols in 60 MHz operation.

Keywords

OFDM modulation; VLSI; cognitive radio; fast Fourier transforms; integrated circuit design; radio transceivers; radiofrequency integrated circuits; wireless LAN; FFT module; IEEE 802.11g; OFDM baseband transceiver; VLSI design; cognitive radio; dynamic spectrum access; frequency 60 MHz; mapping-demapping module; spectrum intensity; subcarrier level carrier sensing; AWGN; Binary phase shift keying; CMOS integrated circuits; Field-flow fractionation; Indexes; OFDM; Variable speed drives;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Signal Processing and Communication Systems (ISPACS), 2010 International Symposium on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-7369-4

Type

conf

DOI

10.1109/ISPACS.2010.5704681

Filename

5704681