Multicode modulation for high-speed wireless data transmission

Recently, a new modulation technique, known as multicode modulation, has been proposed to transmit highspeed data over multipath wireless links. In this paper, we investigate the use of various combination of orthogonal codes and signature sequences in multicode modulation and propose a low-complexity receiver structure which uses Fast Walsh Transform or Fast Fourier Transform. To further improve system performance, we also consider the use of antenna diversity and convolutional coding. Sample numerical results which illustrate the potential of multicode modulation over multipath Rayleigh fading links will also be presented.