Patent ID: 7313195

Claim:
A PAPR (peak to average power ratio) reduction method using bit reallocation, applied in a multi-carrier system, a transmitter of the multi-carrier system transmitting D-bit data at N sub-carriers over a channel, the method comprising the steps of: an initializing step, for initializing a bit loading algorithm to allocate d i bits required at the i-th sub-carrier for data transmission, wherein 0≦i≦(N−1); a PAPR computing step, for computing the PAPR of the multi-carrier system in accordance with d i bits transmitted at the i-th sub-carrier; a comparing step, for determining if the PAPR is larger than a predetermined value A, and if yes, terminating the PAPR reduction method; and an adjusting step, for performing an adjustment of increasing Δd bits at a first selected sub-carrier and decreasing Δd bits from a second selected sub-carrier, and then executing the PAPR computing step.