Title :
Analysis and improvement of the J.83 annex B trellis code for cable modems
Author :
Gatherer, Alan ; Ali, Murtaza
Author_Institution :
DSPS R&D Center, Texas Instrum. Inc., TX, USA
Abstract :
The SCTE and IEEE802.14 cable modem standards specify a trellis code that is not a simple variant of one of the Ungerboeck or Wei codes that are commonly used as benchmarks in the industry. As far as the authors know there has been no published analysis of the cable modem code and so we commence this paper with an analysis of the code properties that show it is not as powerful as the better known Wei codes. We then show how a simple modification to the code produces up to 1.2 dB performance improvement.
Keywords :
IEEE standards; modems; telecommunication cables; telecommunication standards; trellis codes; IEEE802.14 cable modem standard; J.83 annex B trellis code; SCTE cable modem standard; Ungerboeck codes; Wei codes; cable modems; code properties; performance improvement; Bit rate; Code standards; Convolutional codes; Degradation; Digital signal processing; Instruments; Modems; Quadrature phase shift keying; Research and development; Signal to noise ratio;
Conference_Titel :
Signals, Systems & Computers, 1998. Conference Record of the Thirty-Second Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5148-7
DOI :
10.1109/ACSSC.1998.751629
