Adaptive sigma delta ADC for WiMAX fixed point wireless applications

Author

Farahani, Bahar Jalali ; Ismail, Mohammed

Author_Institution

Analog VLSI Lab, Ohio State Univ., Columbus, OH

fYear

2005

fDate

7-10 Aug. 2005

Firstpage

692

Abstract

The increasing demand for wireless broadband connection emerged in worldwide interoperability microwave access (WiMAX) system which is revolutionizing the broadband wireless world by providing it with a specific standard and ensures the inter-operability among different providers. WiMAX systems support different signal bandwidths (1.25 MHz-20 MHz) and different modulation schemes (BPSK to 64 QAM). For such a multi-mode system, a sigma delta ADC is proposed that provides variable requirements of WiMAX. The sigma delta ADC uses an innovative technique called adaptive line enhancer (ALE) to boost the performance of the analog to digital conversion in the digital post-processing section of the sigma delta ADC

Keywords

WiMax; adaptive modulation; broadband networks; sigma-delta modulation; 1.25 to 20 MHz; adaptive line enhancer; adaptive sigma delta ADC; broadband wireless world; digital post-processing; worldwide interoperability microwave access; Analog-digital conversion; Bandwidth; Binary phase shift keying; Circuit noise; Delta-sigma modulation; Line enhancers; Quantization; Signal resolution; Very large scale integration; WiMAX;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. 48th Midwest Symposium on

Conference_Location

Covington, KY

Print_ISBN

0-7803-9197-7

Type

conf

DOI

10.1109/MWSCAS.2005.1594195

Filename

1594195