TY - GEN
T1 - Channel Identification of communication system with nonlinear power amplifier
AU - Cai, Kuang
AU - Li, Hongbin
AU - Mitola, Joseph
PY - 2013
Y1 - 2013
N2 - In communication system, power amplifiers (PAs) are important components and inherently nonlinear. In such systems, when a nonconstant modulus signal goes through the nonlinear PA, spectral regrowth (broadening) appears in the output. For channel identification which is based on the observation of system output, the spectral information contained in the outband would help to improve the estimation accuracy. Given that training input symbols are available, we introduce two channel identification algorithms by exploiting outband radiation for two cases. Specifically, when the PA input/output relation is fully known, our channel identification is based on the application of best linear unbiased estimators (BLUE); for a more common case, when the PA input/output relation is partially known, we propose an iterative channel identification algorithm. Our simulation results demonstrate the performance of our new approaches.
AB - In communication system, power amplifiers (PAs) are important components and inherently nonlinear. In such systems, when a nonconstant modulus signal goes through the nonlinear PA, spectral regrowth (broadening) appears in the output. For channel identification which is based on the observation of system output, the spectral information contained in the outband would help to improve the estimation accuracy. Given that training input symbols are available, we introduce two channel identification algorithms by exploiting outband radiation for two cases. Specifically, when the PA input/output relation is fully known, our channel identification is based on the application of best linear unbiased estimators (BLUE); for a more common case, when the PA input/output relation is partially known, we propose an iterative channel identification algorithm. Our simulation results demonstrate the performance of our new approaches.
KW - Power amplifier
KW - iterative channel identification
KW - outband energy
UR - http://www.scopus.com/inward/record.url?scp=84881529908&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84881529908&partnerID=8YFLogxK
U2 - 10.1109/CISS.2013.6552268
DO - 10.1109/CISS.2013.6552268
M3 - Conference contribution
AN - SCOPUS:84881529908
SN - 9781467352376
T3 - 2013 47th Annual Conference on Information Sciences and Systems, CISS 2013
BT - 2013 47th Annual Conference on Information Sciences and Systems, CISS 2013
T2 - 2013 47th Annual Conference on Information Sciences and Systems, CISS 2013
Y2 - 20 March 2013 through 22 March 2013
ER -