A mobile station device and method which includes a preamble generator for generating a preamble signal intermittently to be transmitted during a preamble interval prior to a transmission interval of a reverse access channel message; and a transmitter for spreading and modulating the preamble signal received from the preamble generator and transmitting it to a base station. Considering that the knee is free to flexextend but has much more limited motions about the off-axes, ACL injuries are often associated with excessive off-axis loadings. A plurality of the delayed clock signals are combined to generate a plurality of output signals.