… However, they require the transmitter to have perfect channel state information, which is …
partial) channel feedback on the throughput of OFDM systems. Two channel uncertainty models …

… power which hugely reduces the complexity of the algorithm. Then, we study the exclusive
effect of channel estimation error on resource allocation… expression for power allocation which …

… +OFDM system in terms of MMSE in the presence of channel uncertainties. Unlike other
classical solutions, which consider an ideal CSI knowledge, channel … to channel uncertainties. …

… Using (15) in (12) to solve for pm,k, we are able to closely approximate the power allocation
function pm,k. We plot the power allocation function using the Gamma pdf approximation …

… power allocation as a function of the estimated CNR Ki, k for uncoded 4-QAM and 64-QAM
for various P,ik. We also plot the power allocation … ), the power allocation function approaches …

… refer systems, where the base station has imperfect CSI. We address to the … knowledge of
the channel at the base station as the problem of subchannel assignment and power allocation…

… We assume perfect channel knowledge. We investigate power allocation in order to maximize
the rate, both for a sum power constraint, and individual constraints at the source and at …

… CSI means that we have knowledge only about the average channel gain over all the … we
propose an optimal power allocation algorithm and a suboptimal power allocation algorithm. In …

… the power allocation problem in a two-hop OFDM relay link with a nonregenarative relay
where the available channel … A power allocation method is proposed to maximize the expected …

… –OFF power allocation [17], [18], where power is allo… power allocation, where power is
allocated equally to all subcarriers. Third, we address the issue of imperfect channel knowledge in …