Quantization issues for the design of a 3rd-generation CDMA wireless handset transmitter

Author

Mandyam, Giridhar D.

Author_Institution

Nokia Res. Center, Irving, TX, USA

fYear

1999

fDate

1999

Firstpage

3.1

Lastpage

3.7

Abstract

A full analysis is presented on quantization analysis for the reverse link transmitter chain in the third-generation IS-95, i.e., cdma2000 system. Of particular interest is how reverse link channels are scaled prior to subsequent quantization as a result of digital-to-analog conversion. Through analysis, two methods of quantization are proposed - fixed and adaptive. In addition, the impact of D/A converter nonlinearity on resultant signal-to-noise ratio is analyzed. Simulations are provided which show that adaptive quantization has a slight performance benefit over fixed methods in terms of ACPR

Keywords

digital-analogue conversion; mobile radio; quantisation (signal); radio transmitters; D/A converter nonlinearity; adaptive quantization; cdma2000; channel scaling; digital-to-analog conversion; fixed quantization; reverse link transmitter chain; signal-to-noise ratio; third-generation IS-95; wireless handset transmitter; Baseband; Digital-analog conversion; Equations; Filters; Multiaccess communication; Pulse shaping methods; Quantization; Signal analysis; Telephone sets; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Systems, 2000. 1999 Emerging Technologies Symposium

Conference_Location

Richardson, TX

Print_ISBN

0-7803-5554-7

Type

conf

DOI

10.1109/ETWCS.1999.897311

Filename

897311