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

Volume

2

fYear

1996

Firstpage

1336

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th

Conference_Location

Atlanta, GA

ISSN

1090-3038

Print_ISBN

0-7803-3157-5

Type

conf

DOI

10.1109/VETEC.1996.501530

Filename

501530