To address the need for reducing pilot overhead, a method and apparatus
for transmitting and receiving data is provided herein. A communication
system having a transmitter (100) that utilizes adaptive modulation and
coding (AMC) and utilizes lower-order modulated (e.g., QPSK) data as a
substitute for pilot symbols during transmission. Data intended for a
user utilizing a lower order modulation can be reliably detected, and if
properly processed, used as pilots for a user that is trying to receive a
higher order modulation (e.g., 64-QAM). Because lower order modulated
data is utilized for pilots, fewer overall pilots are used. This greatly
reduces pilot overhead, increasing data throughput.