A programmable DSP front-end for all-digital 4G transmitters

Author

Roverato, Enrico ; Kosunen, Marko ; Lemberg, Jerry ; Stadius, Kari ; Ryynanen, Jussi ; Eloranta, P. ; Kaunisto, Risto ; Parssinen, Aarno

Author_Institution

Dept. of Micro- & Nanosci., Aalto Univ., Espoo, Finland

fYear

2013

fDate

16-19 June 2013

Firstpage

1

Lastpage

4

Abstract

This paper presents a digital interpolation chain for non-integer large-ratio sampling rate conversion, targeted to 4G applications. Such a system is needed in all-digital transmitters, where the sampling rate of the digital input to the RF front-end must be an exact submultiple of the carrier frequency. A highly flexible architecture is proposed to reduce system complexity when the RF requirements are more relaxed. The presented interpolation chain has been especially optimized by taking into account the requirements for LTE and LTE-A, but it can be used in multistandard applications as well. The system achieves excellent ACLR of 83 dB, EVM degradation of 0.03%, and RX-band noise below -160 dBc/Hz.

Keywords

4G mobile communication; Long Term Evolution; digital signal processing chips; interpolation; radio transmitters; LTE-A; all-digital 4G transmitters; carrier frequency; digital interpolation chain; noninteger large-ratio sampling rate conversion; programmable DSP front-end; Attenuation; Bandwidth; Digital signal processing; Interpolation; Noise; Radio frequency; Radio transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

New Circuits and Systems Conference (NEWCAS), 2013 IEEE 11th International

Conference_Location

Paris

Print_ISBN

978-1-4799-0618-5

Type

conf

DOI

10.1109/NEWCAS.2013.6573634

Filename

6573634