Calculation of the bit error probability in a direct sequence spread spectrum system with code division multiple access

After a short introduction to the direct-sequence spread-spectrum system under study and a description of the model used for reception, the code sequences are selected. These sequences, obtained from Gold code sequences with m=9, are selected using an empirical method which tries to minimize the influence of one code sequence upon others. After selecting the code sequences the bit error probability is calculated from the mean values of these influences and a Gaussian approximation. Results confirm, in this particular case, the validity of the use of random sequences for the calculation of the bit error probability