Constellation selection for the high speed digital modems

Author

Hussain, Arshad ; Khan, M. Asadullah

Author_Institution

Nat. Univ. of Comput. & Emerging Sci., Lahore, Pakistan

fYear

2003

fDate

8-9 Dec. 2003

Firstpage

131

Lastpage

134

Abstract

We present a procedure to dynamically generate the constellation sets of pulse code modulation (PCM) octets, which represent digital data on the public switched telephone network (PSTN). The underlying mathematical modeling of the digital modem has been exploited in order to develop a novel technique, which allows the lower power constellation points to be spaced as far apart as possible from each other without compromising on the data rate and power limitation. The application of the algorithm lies in the design and development of the V.90, and V.92 high-speed modems.

Keywords

digital communication; modems; pulse code modulation; telephone networks; PCM octets; PSTN; V.90 high-speed modem; V.92 high-speed modem; constellation selection; data rate; digital data; dynamically generated constellation sets; high speed digital modems; mathematical modeling; power constellation points spacing; power limitation; public switched telephone network; pulse code modulation octets; Algorithm design and analysis; Computer networks; Digital modulation; Modems; Modulation coding; Phase change materials; Pulse generation; Pulse modulation; Quadrature amplitude modulation; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Multi Topic Conference, 2003. INMIC 2003. 7th International

Print_ISBN

0-7803-8183-1

Type

conf

DOI

10.1109/INMIC.2003.1416669

Filename

1416669