A simple method to estimate carrier leakage with carrier frequency error

Author

Nakada, J. ; Tajiri, S.

Author_Institution

Advantest Corp., Saitama, Japan

fYear

1994

fDate

10-12 May 1994

Firstpage

1400

Abstract

This paper discusses a new method of estimating the carrier leakage for evaluation of a DQPSK modulated signal. Measured values such as modulation accuracy, carrier frequency error, and IQ origin offset are used in the evaluation of digitally modulated signals. In this new method, the carrier leakage is estimated from two adjacent symbols that form an isosceles triangle. The method is applicable when the transmitted digital data is completely demodulated or when the transmitted data is known. It is available when there is carrier frequency error in a modulated signal

Keywords

cellular radio; digital communication; fault diagnosis; quadrature phase shift keying; radiotelephony; DQPSK modulated signal; IQ origin offset; carrier frequency error; carrier leakage; digital cellular telephone; digitally modulated signals; isosceles triangle; modulation accuracy; Crosstalk; Digital modulation; Frequency estimation; Frequency modulation; Oscillators; Performance evaluation; Phase modulation; Signal generators; Telephony; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1994. IMTC/94. Conference Proceedings. 10th Anniversary. Advanced Technologies in I & M., 1994 IEEE

Conference_Location

Hamamatsu

Print_ISBN

0-7803-1880-3

Type

conf

DOI

10.1109/IMTC.1994.352157

Filename

352157