Title :
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
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;
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
DOI :
10.1109/GLOCOM.1991.188441
