EURASIP Journal on Wireless Communications and Networking
Volume 2008 (2008), Article ID 586172, 14 pages
doi:10.1155/2008/586172
Abstract
This paper proposes two cyclostationarity-inducing
transmission methods that enable the receiver to distinguish
among different systems that use a common orthogonal frequency
division multiplexing- (OFDM-) based air interface. Specifically,
the OFDM signal is configured before transmission such that its
cyclic autocorrelation function (CAF) has peaks at certain preselected
cycle frequencies. The first proposed method inserts a
specific preamble where only a selected subset of subcarriers is
used for transmission. The second proposed method dedicates a
few subcarriers in the OFDM frame to transmit specific signals
that are designed so that the whole frame exhibits cyclostationarity
at preselected cycle frequencies. The detection probabilities
for the proposed cyclostationarity-inducing transmission methods
are evaluated based on computer simulation when optimum and
suboptimum detectors are used at the receiver.