Performance analysis of a slotted-ALOHA network using errorcorrection and error detection coding with BPSK modulation

摘要

The performance of a slotted ALOHA-network in a slowRayleigh-fading channel for mobile data communications is investigatedconsidering error correction and detection coding with binary phaseshift keying (BPSK) modulation. The performance is measured in terms ofreceiver error probability and throughput. An enhanced performance isobtained by using error correction coding. In spite of the use of errorcorrection coding, a packet can be in error, i.e. the receivererroneously detects a codeword that none of the terminals transmitted.Bounded distance decoding can be used effectively to reduce the packeterror probability. A comparison of the performance is presented for aspecific code with equal Hamming distance d_min, exchangingbetween the error correcting and error detecting capability of thatcode. Also, the effects of signal carrier detection on receiver errorprobability and throughput are investigated