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1. (WO2017064448) TONE RESERVATION BASED ON TREE SEARCH FOR PAPR REDUCTION IN OFDM SYSTEMS

Pub. No.:    WO/2017/064448    International Application No.:    PCT/GB2015/053089
Publication Date: Fri Apr 21 01:59:59 CEST 2017 International Filing Date: Sat Oct 17 01:59:59 CEST 2015
IPC: H04L 27/26
H04L 25/03
H04L 1/00
Applicants: TOSHIBA RESEARCH EUROPE LIMITED
KABUSHIKI KAISHA TOSHIBA
Inventors: TOSATO, Filippo
SANDELL, Magnus Stig Torsten
Title: TONE RESERVATION BASED ON TREE SEARCH FOR PAPR REDUCTION IN OFDM SYSTEMS
Abstract:
An OFDM transmitter comprising an input for acquiring or receiving a signal to be transmitted, an output for transmitting a PAPR reduced version of the signal, a processor and memory storing code for execution by the processor. The processor, when executing the code, is configure to determine a plurality of possible values of tone reservation, hereinafter referred to as TR, tones for use in TR based PAPR reduction and to perform a tree search over some or all of the possible values under a first constraint that the average power per TR tone does not exceed the average power per tone used for data transmission and a second constraint that selected values for the TR tones reduce PAPR.