Title :
An improved scheme in CDMA forward link using unequal error protection
Author :
Kim, Sunyoung ; Kang, Bubju ; Oh, Kilnam
Author_Institution :
Electron. & Telecommun. Res. Inst., Taejeon, South Korea
Abstract :
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 0.4~1 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
Keywords :
channel coding; code division multiple access; convolutional codes; error correction codes; error statistics; fading channels; land mobile radio; linear predictive coding; multipath channels; multiuser channels; phase shift keying; radio links; vocoders; BPSK modulation; CDMA forward link; CS-ACELP speech coder; RCPC channel coder; SEGSNR; bit error sensitivity; improved scheme; multipath fading channel; performance; power control bit; quality improvement; rate compatible punctured convolutional code; transmission rate; unequal error protection; wireless system; Binary phase shift keying; Error correction codes; Fading; Information analysis; Modulation coding; Multiaccess communication; Performance analysis; Power control; Speech analysis; Wireless sensor networks;
Conference_Titel :
Universal Personal Communications, 1998. ICUPC '98. IEEE 1998 International Conference on
Conference_Location :
Florence
Print_ISBN :
0-7803-5106-1
DOI :
10.1109/ICUPC.1998.733671
