GNSS receiver apparatus with GNSS pseudo random noise delayed sequence generator

A GNSS (Global Navigation Satellite System) receiver apparatus comprising a tracking module comprising a plurality of tracking channels, each tracking channel comprising:

• a bank of correlators configured to receive in-phase and quadrature versions of a received signal;
• a code numerical controlled oscillator configured to determine a code frequency;
• a GNSS pseudo random noise sequence generator configured to generate a pseudo random noise sequence at the code frequency set by the code numerical controlled oscillator;
• a GNSS pseudo random noise delayed sequence generator comprising a first delay line with a first shift register and a second delay line with a second shift register, each shift register having a plurality of flip-flops arranged in series with taps at an output of each flip-flop, the pseudo random noise sequence coupled to an input of a first shift register, wherein taps of the shift registers are selectable as a punctual replica, an early replica and a delayed replica of the pseudo random noise sequence based on a selection signal issued by control logic of the receiver apparatus;
• and
• an enable circuit configured to generate an enable signal coupled to an enable input of the flip-flops, the enable signal operating at a selectable enable frequency.

A method for generating a GNSS Pseudo Random Noise delayed sequence in a GNSS receiver apparatus, the method comprising:

• receive in-phase and quadrature versions of a received signal;
• determining a code frequency,
• generating a pseudo random noise sequence at the code frequency,
• generating an enable frequency by selecting one of a plurality of possible enable frequencies;
• generating a punctual replica of the pseudo random noise sequence, the punctual replica being generated at the enable frequency;
• generating an early replica of the pseudo random noise sequence, the early replica being generated at the enable frequency,
• generating a delayed replica of the pseudo random noise sequence, the delayed replica being generated at the enable frequency;
• and
• selecting one of the punctual replica, the early replica or the delayed replica.