ETTC'2003 - SEE

the inverse of N×N correlation matrix is used to the linear multiuser detection. As to the
asynchronous case, the order of the correlation matrix is MN, resulting heavy computation, where
M is the message length, N is the number of active users.
The mobile users
transmit signal controlled
by the inner timer and the
users can transmit
simultaneously. Because
the difference of distance
between the mobile user
and the base station is very
small, So the base station
r(t) Matched
Filter
Bank
Z=REb+n
can receive the mobile users’ signal in a transmission delay τ kj