A system configured to determine a delay estimate τ̂ of a transmission delay incurred by a navigation signal received at the system, wherein the navigation signal is indicative of a carrier signal modulated with a code signal and modulated with a subcarrier signal; wherein the system comprises - an Early-Late signal generation unit configured to generate an EP signal, a LP signal, a PE signal and a PL signal based on the code signal, based on the subcarrier signal and based on a first delay estimate τ̃; wherein - the EP signal is generated based on the code signal delayed by the first delay estimate τ̃, and the subcarrier signal delayed by the first delay estimate τ̃ and advanced by a first subcarrier separation time; - the LP signal is generated based on the code signal delayed by the first delay estimate τ̃, and the subcarrier signal delayed by the first delay estimate τ̃ and delayed by a second subcarrier separation time; - the PE signal is generated based on the code signal delayed by the first delay estimate τ̃ and advanced by a first code separation time, and the subcarrier signal delayed by the first delay estimate τ̃; and - the PL signal is generated based on the code signal delayed by the first delay estimate τ̃ and delayed by a second code separation time, and the subcarrier signal delayed by the first delay estimate τ̃; - a delay locked loop (202, 203-4, 203-5, 204-4, 204-5, 207, 208) configured to determine the first delay estimate τ̃ based on the received navigation signal, the EP signal and the LP signal; and - a detection path (202, 203-1, 203-2, 204-1, 204-2, 209, 210 211) configured to determine a delay offset based on the received navigation signal, the PE signal and the PL signal; wherein the system is configured to determine the delay estimate τ̂ based on the first delay estimate τ̃ and based on the delay offset. - an Early-Late signal generation unit configured to generate an EP signal, a LP signal, a PE signal and a PL signal based on the code signal, based on the subcarrier signal and based on a first delay estimate τ̃; wherein - the EP signal is generated based on the code signal delayed by the first delay estimate τ̃, and the subcarrier signal delayed by the first delay estimate τ̃ and advanced by a first subcarrier separation time; - the LP signal is generated based on the code signal delayed by the first delay estimate τ̃, and the subcarrier signal delayed by the first delay estimate τ̃ and delayed by a second subcarrier separation time; - the PE signal is generated based on the code signal delayed by the first delay estimate τ̃ and advanced by a first code separation time, and the subcarrier signal delayed by the first delay estimate τ̃; and - the PL signal is generated based on the code signal delayed by the first delay estimate τ̃ and delayed by a second code separation time, and the subcarrier signal delayed by the first delay estimate τ̃; - the EP signal is generated based on the code signal delayed by the first delay estimate τ̃, and the subcarrier signal delayed by the first delay estimate τ̃ and advanced by a first subcarrier separation time; - the LP signal is generated based on the code signal delayed by the first delay estimate τ̃, and the subcarrier signal delayed by the first delay estimate τ̃ and delayed by a second subcarrier separation time; - the PE signal is generated based on the code signal delayed by the first delay estimate τ̃ and advanced by a first code separation time, and the subcarrier signal delayed by the first delay estimate τ̃; and - the PL signal is generated based on the code signal delayed by the first delay estimate τ̃ and delayed by a second code separation time, and the subcarrier signal delayed by the first delay estimate τ̃; - a delay locked loop (202, 203-4, 203-5, 204-4, 204-5, 207, 208) configured to determine the first delay estimate τ̃ based on the received navigation signal, the EP signal and the LP signal; and - a detection path (202, 203-1, 203-2, 204-1, 204-2, 209, 210 211) configured to determine a delay offset based on the received navigation signal, the PE signal and the PL signal;