Title :
4-dimensional modulation for a bandlimited channel using Q2 PSK
Author_Institution :
ETRI, Taejon, South Korea
Abstract :
We introduce M-ary orthogonal modulation for a bandlimited channel with non-linearity. A set of 16 vectors which have the minimum distance is symmetrically constructed on the surface of a 4-dimensional (4-D) sphere. For the modulation, we have used 4-D orthogonal basis signals whose power efficiency is maximized within a fixed bandwidth. We compare the performance of 4-D constant amplitude signals in terms of transmission parameters on the additive white Gaussian noise (AWGN) channel. After mapping the derived 4-D vectors into the modulation without coding, we have obtained 2.7 dB gain over QPSK and 0.9 dB over Q 2PSK in signal-to-noise ratio (SNR) while maintaining the minimum bandwidth
Keywords :
AWGN channels; bandlimited communication; demodulation; quadrature phase shift keying; 0.9 dB; 2.7 dB; 4-dimensional sphere; 4D constant amplitude signals; 4D modulation; 4D orthogonal basis signals; AWGN channel; M-ary orthogonal modulation; Q2PSK; SNR; additive white Gaussian noise channel; bandlimited channel; demodulation; nonlinear channel; power efficiency maximization; signal-to-noise ratio; transmission parameters; AWGN; Bandwidth; Error analysis; Error probability; Optical surface waves; Phase modulation; Phase shift keying; Quadrature phase shift keying; Signal generators; Signal to noise ratio;
Conference_Titel :
Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5668-3
DOI :
10.1109/WCNC.1999.796882
