Patent ID: 8934571
Filing Date: 2015-01-13
Classification: H04L

Abstract:
1. A method for optimising at least one Peak to Average Power Ratio (PAPR) in data for transmission over a telecommunications network in the frequency domain using multiple frequency sub-carriers, the method comprising: segmenting frequency sub-carriers modulated with data within a data block into a plurality of clusters of frequency sub-carriers; embedding a sub-carrier modulated with control data within each cluster of frequency sub-carriers; modifying the phase of each data modulated sub-carrier using the phase of the corresponding control data modulated sub-carrier to provide a modified data modulated sub-carrier; adding a phase shift to every modified data modulated sub-carrier and adding the same phase shift to every control data modulated sub-carrier within a cluster and determining the PAPR for the added phase shift; varying the phase shift added and determining the PAPR for the varied phase shift; repeating the step of varying the phase shift added and determining the PAPR for each varied phase shift to determine an optimised PAPR phase shift; transmitting the phase shifted cluster, wherein the phase shifted cluster is decodable without requiring information on the optimised PAPR phase shift.