Title :
An FEC overlay for idle slot utilization for IS-136
Author :
Yeh, Ernest Nanjung ; Hammons, A. Roger, Jr.
Author_Institution :
Hughes Network Syst. Inc., Germantown, MD, USA
Abstract :
BellSouth has proposed a modification to the IS-136 digital cellular standard, which they refer to as Advanced Vocoder Idle Channel Exploitation (ADVICE), in which base stations can transmit auxiliary coded (redundant) bits on otherwise unused time slots to assist certain subscriber units (SUs). We investigate two aspects of ADVICE: (1) adaptive redundancy schemes by which auxiliary bits are generated, and (2) autonomous detection mechanisms by which the SUs detect the presence of such auxiliary bits without external signaling
Keywords :
cellular radio; convolutional codes; digital radio; forward error correction; maximum likelihood detection; telecommunication standards; vocoders; ADVICE; Advanced Vocoder Idle Channel Exploitation; BellSouth; FEC overlay; Hamming distance metric; IS-136 digital cellular standard; TDMA; adaptive Hamming-distance threshold; adaptive redundancy; autonomous detection; auxiliary bits detection; auxiliary coded bits; base stations; idle slot utilization; maximum likelihood statistic; rate-compatible convolutional coding; redundant bits; subscriber units; Adaptive signal detection; Base stations; Channel coding; Code standards; Convolutional codes; Protection; Radio frequency; Speech coding; Time division multiple access; Vocoders;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778084
