Title | Analysis of wireless data networks with retransmission diversity combining in a cluttered environment |
Publication Type | Conference Paper |
Year of Publication | 1997 |
Authors | Annmalai, A., and V. K. Bhargava |
Conference Name | Personal Wireless Communications, 1997 IEEE International Conference on |
Pagination | 449 -454 |
Date Published | dec. |
Keywords | adaptive retransmission diversity combining, adaptive systems, cluttered environment, code division multiple access, coding errors, data communication, delay performance, delays, diversity reception, DS-CDMA, DS/CDMA ALOHA, fading, feedback channel errors, frequency-selective Rayleigh fading channel, network throughput, noisy packets, packet error probability, packet header failure rate, packet radio networks, packet-switched CDMA networks, probability, radio receivers, Rayleigh channels, receiver complexity, reliable packet combining, slotted random access, spread spectrum communication, time-varying channels, unslotted random access, wireless data networks |
Abstract | An adaptive retransmission diversity combining scheme is investigated for both the slotted and unslotted random access packet-switched code division multiple access networks over a frequency-selective Rayleigh fading channel. Multiple received noisy packets are combined on a bit by bit basis to form a single, more reliable packet. A novel mechanism to ensure a reliable packet combining operation is outlined. It is shown that packet combining is an effective mechanism for enhancing the network throughput and delay performance of the conventional DS/CDMA ALOHA, while sustaining a reasonable receiver complexity. This scheme is highly advantageous for systems which can tolerate a certain delay and operate over highly time-varying channels. We also examine the sensitivity of the system performance to the packet header failure rate and in the presence of feedback channel errors |
URL | http://dx.doi.org/10.1109/ICPWC.1997.655560 |
DOI | 10.1109/ICPWC.1997.655560 |