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4-dimensional modulation for a bandlimited channel using Q2 PSK

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1 Author(s)
Hae Geun Kim ; ETRI, Taejon, South Korea

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

Published in:

Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE

Date of Conference:

1999