1 research outputs found
Capacity, throughput, and delay of slotted ALOHA DS-CDMA links with adaptive space-time auxiliary-vector receivers
Δημοσίευση σε επιστημονικό περιοδικόSummarization: —We investigate the user capacity, throughput, and
delay characteristics of a mobile slotted ALOHA direct-sequence
code-division-multiple-access (DS-CDMA) link with dedicated
signatures under multipath fading and packet-rate adaptive antenna
array signal reception. For a given system transmission bit
rate, the packet size is designed to be sufficiently small to conform
with the coherence time of the channel. Then, on an individual
packet-by-packet basis, a phase-ambiguous spatial-temporal
channel estimate is produced by a blind (unsupervised) eigensubspace
procedure. The space–time channel estimate is phase
corrected via a few pilot packet mid-amble bits and used for
joint spatial-temporal multiple-access-interference suppression
according to the principles of auxiliary-vector filtering. Subsequently,
packet success probabilities are derived in the presence
or absence of forward error correction and are used to evaluate
the throughput and delay characteristics of the linkPresented on: IEEE Transactions on Wireless Communication