ASIP-Based Universal Demapper for Multiwireless Standards

Author

Jafri, Atif Raza ; Baghdadi, Amer ; Jézéquel, Michel

Author_Institution

CNRS Lab.-STICC, Inst. Telecom, Brest, France

Volume

1

Issue

1

fYear

2009

fDate

5/1/2009 12:00:00 AM

Firstpage

9

Lastpage

13

Abstract

The emergence of diverse wireless standards, employed in various transmission environments, is leading towards evolution of flexible radio platforms. In this letter, we are presenting the first universal Application Specific Instruction-set Processor (ASIP)-based flexible demapper component of a radio platform. The proposed architecture provides full flexibility ranging from low complexity QPSK Gray-mapped constellations to high complexity 256-QAM rotated constellations in turbo demodulation framework. The presented architecture provides the liberty to use this demapper both in iterative and noniterative receivers. Besides flexibility, ASIP synthesis results demonstrate a throughput of 606 Mega LLR per second for 16-QAM Gray-mapped constellation.

Keywords

demodulation; microprocessor chips; quadrature amplitude modulation; quadrature phase shift keying; radio receivers; 256-QAM rotated constellation; ASIP; QPSK Gray-mapped constellation; application specific instruction-set processor; flexible radio platform; iterative receiver; multiwireless standard; noniterative receiver; turbo demodulation; universal demapper; Application specific instruction-set processor (ASIP); demapper; modulation; multiwireless standards;

fLanguage

English

Journal_Title

Embedded Systems Letters, IEEE

Publisher

ieee

ISSN

1943-0663

Type

jour

DOI

10.1109/LES.2009.2028041

Filename

5170183