'Global navigation satellite system' (Telecommunications, 2017), 'Transceiver and System Design for Digital Communications, 5th Edition', Chap. 13, pp. 389-404, DOI: 10.1049/PBTE080E_ch13
IET Digital Library, https://digital-library.theiet.org/;jsessionid=21edek398ejn0.x-iet-live-01content/books/10.1049/pbte080e_ch13