An improved scheme in CDMA forward link using unequal error protection

An improved scheme including unequal error protection in the CDMA forward link for the IMT-2000 is presented. The performance of this scheme is analyzed by the use of a CS-ACELP speech coder, which was proposed primarily for a wireless system, and RCPC channel coder over multipath fading channel and BPSK modulation. From the combined analysis results of the bit error sensitivity information on the CS-ACELP coder, a quality improvement of 0.4/spl sim/1 dB in the SEGSNR is achieved. A flexible replacement of the conventional structure without a change of the total transmission rate and without puncturing of the power control bit can be obtained.