Patent ID: 7411896
Filing Date: 2008-08-12
Classification: H04B,H04L

Abstract:
1. A method comprising: partitioning a set of data symbols having true positions into a plurality of subsets of data symbols, the data symbols being used to modulate a set of sub-carriers, the sub-carriers being used to transmit signals from a transmitter to a receiver; assigning the subsets of data symbols to the corresponding sub-carriers based on a predefined set of assignments, the assignments being chosen such that a peak to average power ratio (PAPR) of the transmitted signals is minimal; and communicating in a separate channel, information identifying the chosen assignments to the receiver which is used by the receiver to place the data symbols back to the true positions; wherein, if the assignment of data symbols to the sub-carriers are made by reordering a segment of the data symbol stream that is longer than the number of symbols that can be held by a single OFDM symbol, the assignment information for the respective segment is sent to the receiver embedded in one of the OFDM symbols.