Performance of π/4-QPSK baseband differential detection under frequency offset conditions

Author

Powell, Clinton C. ; Boccuzzi, Joseph

Author_Institution

Motorola, Inc., Boynton Beach, FL, USA

fYear

1991

fDate

2-5 Dec 1991

Firstpage

526

Abstract

π/4-QPSK is a suitable modulation scheme for the portable radio environment. Imperfect quadrature mixing to baseband is investigated in an additive white Gaussian noise environment. The performance degradation in bit error rate is analyzed by means of simulation. Simulations are run for roll-off factors (α) (of the spectral shaping filters) of α=0.35 and α=0.55. The results show that frequency stability techniques are necessary when implementing a baseband differential demodulator

Keywords

automatic frequency control; demodulation; error statistics; mobile radio systems; phase shift keying; signal detection; white noise; AFC; additive white Gaussian noise; baseband differential demodulator; bit error rate; demodulation; frequency offset conditions; frequency stability techniques; imperfect quadrature mixing to baseband; performance degradation; pi /4-QPSK baseband differential detection; portable radio; roll-off factors; simulation; spectral shaping filters; Additive white noise; Analytical models; Baseband; Bit error rate; Degradation; Error analysis; Filters; Frequency; Performance analysis; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1991. GLOBECOM '91. 'Countdown to the New Millennium. Featuring a Mini-Theme on: Personal Communications Services

Conference_Location

Phoenix, AZ

Print_ISBN

0-87942-697-7

Type

conf

DOI

10.1109/GLOCOM.1991.188441

Filename

188441