发明名称 |
SYSTEM AND METHOD FOR PRE-DISTORTION AND ITERATIVE COMPENSATION FOR NONLINEAR DISTORTION IN SYSTEM EMPLOYING FTN SYMBOL TRANSMISSION RATES |
摘要 |
A signal transmission approach comprises encoding a source signal (comprising a plurality of source symbols) to generate a corresponding encoded signal. The encoded signal is modulated by mapping each source symbol to a respective signal constellation point of an applied signal constellation to generate a modulated signal. The modulated signal is pre-distorted based on a distortion estimate to generate a pre-distorted signal. The pre-distorted signal is filtered to generate a filtered signal. The filtered signal is frequency translated and amplified to generate a transmission signal for transmission via an uplink channel of a satellite communications system. To increase throughput, the source signal is processed through the apparatus and the resulting transmission signal is generated at a Faster-than-Nyquist (FTN) symbol rate and with a tight frequency roll-off. The modulated signal is pre-distorted based on a distortion estimate relating to the nonlinearity and the filters applied before and/or after the pre-distorter. |
申请公布号 |
WO2015054437(A1) |
申请公布日期 |
2015.04.16 |
申请号 |
WO2014US59781 |
申请日期 |
2014.10.08 |
申请人 |
HUGHES NETWORK SYSTEMS |
发明人 |
BEIDAS, BASSEL;SEHADRI, ROHIT, LYER;EROZ, MUSTAFA;LEE, LIN-NAN |
分类号 |
H04L25/03 |
主分类号 |
H04L25/03 |
代理机构 |
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