The
channel rate is normalized, 0 < [R.sub.m] <1, m [member of] M.
The required transmit energy P is a function of the
channel rate C (for fixed noise power spectral density [N.sub.0]) for a given set of channel matrices, providing [P.sub.oa](C), [P.sub.ant](C), [P.sub.ch](C), and [P.sub.bl](C).
The advanced multidimensional adaptive return channel supports automatic up link power control (AULPC), adaptive
channel rate, and adaptive Modulation and Coding of up to 8PSK.
1) The value [[eta].sup.*] is constant (for example, it is equal to the mean value of data transmission
channel rate).The simulation results are shown in Fig.
By suitably adjusting this delay, the end result was a DP-QPSK modulated signal equivalent to a single
channel rate of 224 Gb/s.
Common examples include changing the bitrate to fit a particular
channel rate or storage time in PVR-like applications or changing the resolution to allow for different capabilities in the receiving equipment such as sending a High Definition (HD) video stream to a Standard Definition (SD) TV set or displaying SD video on a CIF mobile terminal.
These basic elements are seek time, rotational speed,
channel rate, and caching capability.
For each
channel rate [R.sub.i] to be accommodated, there exists a maximum frame period [T.sub.Fmax], which is determined by Equation 3, and the number of justification bits per frame [D.sub.i].
Practically, the
channel rate set [S.sub.m] can be obtained by the following procedure.