Title :
Irreducible FER for convolutional codes with random bit puncturing: application to CDMA forward channel
Author :
Rege, Kiran M. ; Nanda, Sanjiv
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
Abstract :
We construct a simple analytic model to compute frame error rates for the CDMA forward channel. We find that (pseudo-) random puncturing of the coded bits on the forward channel to provide power control feedback for the reverse channel results in a frame error rate floor even on an AWGN channel. The FER floor around 10-9 is of little consequence in IS-95. The FER floor is around 5×10-6 for the proposed extension of the IS-95 standard to accommodate a 13 kbps vocoder. The latter FER floor is verified through simulations
Keywords :
Gaussian channels; Gaussian noise; cellular radio; code division multiple access; convolutional codes; error statistics; interleaved codes; speech coding; vocoders; white noise; 13 kbit/s; AWGN channel; CDMA forward channel; FER floor; IS-95 standard; analytic model; convolutional codes; frame error rates; interleaving scheme; power control feedback; random bit puncturing; reverse channel; vocoder; AWGN channels; Convolution; Convolutional codes; Error analysis; Feedback; Interleaved codes; Multiaccess communication; Power control; Speech enhancement; Vocoders;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.501530
