A CDM transmission scheme with cancellation technique for accumulated cross-correlation values

We propose adding a code-division-multiplexing transmission scheme with a cyclic shifted-and-extended codes and many-valued modulation scheme to a conventional DSRC-based road vehicle communication system in order to realize seamless communication in high mobility environment. Then, cross-correlation values accumulate by a combination of polarity of transmission data in parallel channels, and the accumulated cross-correlation values make transmission performance to degrade. Therefore, we propose the CDM transmission scheme with a cancellation technique for the accumulated cross-correlation values. Moreover, we calculate transmission performances of the proposed scheme by computer simulations. As a result, the proposed scheme can realize high-quality data transmission in fast fading environment.