Consider a five-tap discrete-time channel
Assume this channel model characterizes the maximum delay spread of the channel, and assume a vector coded system is used over the channel with N = 256 carriers.
(a) What value of µ is needed for the prefix to eliminate ISI between vector code words? What is the overhead associated with this µ?
(b) Find the system matrix representation (12.23) and the singular values of the associated channel matrix H.
(c) Find the transmit precoding and receiver shaping matrices, V and UH, required to orthogonalize the subchannels.