naa a22 4500 510792138 CHVBK 20180411083323.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11277-013-0993-3 doi (NATIONALLICENCE)springer-10.1007/s11277-013-0993-3 PN Code Acquisition Using Belief Propagation with Adaptive Parity Check Matrix [Elektronische Daten] [Jiaqi Zhang, Yukui Pei, Ning Ge] Pseudonoise (PN) code acquisition technique based on iterative message passing algorithm (iMPA) has been proposed due to its short acquisition time and low complexity. However, the cyclic and regular nature of constructed tanner graph makes it difficult to achieve promising performance. To address this problem, this correspondence proposes a new message passing algorithm based on adaptive parity check matrix. We find multiple sets of linear sparse constraints for PN sequence by squaring the generator polynomial. The topology of the graphic models as well as the parity check matrix is adapted every a few iterations to avoid local optima. The performance of proposed algorithm is evaluated in terms of detection probability. Simulation results show that this method provides more than 3dB gains over iMPA with fixed parity check matrix. Springer Science+Business Media New York, 2013 PN code acquisition nationallicence Belief propagation (BP) nationallicence Adaptive parity check matrix nationallicence Zhang Jiaqi Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China aut Pei Yukui Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China aut Ge Ning Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/4(2013-08-01), 3105-3113 0929-6212 71:4<3105 2013 71 11277 https://doi.org/10.1007/s11277-013-0993-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-0993-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Jiaqi Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China aut NATIONALLICENCE 700 1- Pei Yukui Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China aut NATIONALLICENCE 700 1- Ge Ning Department of Electronic Engineering, Tsinghua University, 100084, Beijing, China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/4(2013-08-01), 3105-3113 0929-6212 71:4<3105 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer