发明名称 |
MULTICARRIER DYNAMIC PREDISTORTION FOR DIGITAL TRANSMISSION |
摘要 |
An approach for predistorting signals to be transmitted via a multicarrier satellite transponder to account for inter-symbol interference. Multiple source signals are received. A transmit filter model is applied to each source signal to generate a respective filtered signal. Each filtered signal is translated to a carrier frequency, and the translated signals are summed to generate a composite signal. A common non-linearity model is applied to the composite signal to generate a model transmit signal. The transmit signal is translated to generate a receive signal estimate for each of the filtered signals. A receive filter model is applied to each receive estimate to generate a filtered estimate. Each filtered estimate is subtracted from the respective source signal to generate an error sequence. A fraction of the error sequence is added to the respective source signal to generate a predistorted signal for transmission via a multicarrier satellite transponder. |
申请公布号 |
US2015280757(A1) |
申请公布日期 |
2015.10.01 |
申请号 |
US201514675735 |
申请日期 |
2015.03.31 |
申请人 |
Hughes Network Systems, LLC |
发明人 |
BEIDAS Bassel;BECKER Neal |
分类号 |
H04B1/04 |
主分类号 |
H04B1/04 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method comprising:
receiving a plurality of source signals; applying a transmit filter model to each of the source signals to generate a respective filtered signal for each source signal; translating each of the filtered signals to a respective carrier frequency; summing the translated signals to generate a composite signal; applying a common non-linearity model to the composite signal to generate a model transmit signal; translating the transmit signal to generate a receive signal estimate of each of the filtered signals; applying a receive filter model to each of the receive signal estimates to generate a filtered receive signal estimate; subtracting each filtered receive signal estimate from the respective source signal to generate an error sequence for the respective filtered receive signal estimate; and adding a fraction of the error sequence for each filtered receive signal estimate to the respective source signal to generate a respective predistorted signal for transmission via a multicarrier satellite transponder. |
地址 |
Germantown MD US |