发明名称 |
NON-LINEAR TRANSMITTER PRE-CODING |
摘要 |
A method for pre-coding a digital signal in a transmitter associated with a digital communications system to remove non-linear distortions. The method converts digital bits to be transmitted to a transmit constellation including symbols defining a plurality of the bits and subtracting a modeled constellation from the transmit constellation to provide a pre-coded constellation. The method performs a modulo operation on the pre-coded constellation to limit the number of symbols that are transmitted at any particular point in time and models the pre-coded constellation after the modulo operation using a Volterra series model, where a plurality of terms in the Volterra series are separately modeled and each modeled term of the constellation is added together to provide the modeled constellation. The method filters the pre-coded constellation to interpolate a symbol sequence in the constellation and shape the constellation and converts the shaped constellation to an analog signal to be transmitted. |
申请公布号 |
WO2017019150(A1) |
申请公布日期 |
2017.02.02 |
申请号 |
WO2016US32764 |
申请日期 |
2016.05.16 |
申请人 |
NORTHROP GRUMMAN SYSTEMS CORPORATION |
发明人 |
LIU, Daniel, N. |
分类号 |
H04L25/03;H03F1/32;H04L27/08 |
主分类号 |
H04L25/03 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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