Performance of Punctured Codes for Wireless ATM Networks
- 67 Downloads
This paper presents numerical results for a variable-rate forward error correction (FEC) coding scheme that is based on rate-compatible punctured convolution (RCPC) coding. The rate-compatibility restriction is imposed on the encoder to insure that a single encoder/ decoder may be used to provide a range of code rates. It is demonstrated that RCPC coding can potentially support a broad range of quality of service (QoS) requirements for multimedia services on future asynchronous transfer mode (ATM)-based wireless networking systems. If QoS specifications are too severe for a significant portion of the wireless protocol data unit (PDU)), then FEC at the physical layer may not be sufficient to provide the desired results. In such cases, data link control (DLC) sublayer feedback schemes can be combined with RCPC coding to form a hybrid automatic repeat request (ARQ)/FEC protocol, that still satisfies the rate-compatibility criterion.
KeywordsChannel State Information Code Rate Forward Error Correction Asynchronous Transfer Mode Time Division Multiple Access
Unable to display preview. Download preview PDF.
- 1.J. B. Cain, G. C. Clark, and J. M. Geist, “Punctured Convolution Codes of Rate (n-1)/ n and Simplified Maximum Likelihood Decoding,” IEEE Trans. Inform. Theory, vol. IT-25, pp. 97–100, Jan. 1979.Google Scholar
- 8.M. Barton, “Architecture for Wireless ATM Networks,” in Proc. PIMRC’95, Toronto, Canada, Sept. 1995, pp. 778–782.Google Scholar
- 9.J. G. Proakis, Digital Communications, McGraw Hill, New York, 1989.Google Scholar
- 10.W. C. Jakes, Ed., Microwave Mobile Communications, Wiley, New York, 1974, also reprinted by IEEE Press in 1994.Google Scholar
- 11.M. Barton, “’Unequal Error Protection for Wireless ATM Applications,” in Proc. GLOBECOM’96, London, UK, Nov. 1995, pp. 1911–1915.Google Scholar