Patent ID: 9300499
Filing Date: 2016-03-29
CPC Classification: H04B,H04L

Claim Text:
1. A transmission apparatus for transmitting data within a multi-carrier transmission system including two or more transmission apparatuses that are configured to transmit same data, the same data being encoded and/or modulated a same way and being transmitted using same transmission parameters, the transmission apparatus comprising: a circuitry configured to: receive subcarriers of multi-carrier signals carrying data to be transmitted, distort, using filters, said multi-carrier signals based on a distortion function, said distortion function having an effect of introducing a phase distortion to the subcarriers by modulating a phase of the subcarriers of the multi-carrier signals, and said distortion function being different from distortion functions used by other transmission apparatuses, whose coverage areas overlap with a coverage area of the transmission apparatus, such that corresponding carriers that transmit the same data from the other transmission apparatuses are filtered differently by the other transmission apparatuses, and transmit said distorted multi-carrier signals as a transmission signal, wherein application of said distortion function to said multi-carrier signals is invisible to a receiver that receives said distorted multi-carrier signals.