Global Positioning Systems (GPS) and Global Navigation Satellite Systems (GNSS)

1. GNSS Signal Structure and Processing
   1. Signal Components
      1. Carrier Frequencies
         1. L-Band Frequency Allocation
         2. L1 Frequency Band
         3. L2 Frequency Band
         4. L5 Frequency Band
         5. Additional Frequency Bands
      2. Ranging Codes
         1. Coarse Acquisition (C/A) Code
         2. Precise (P) Code
         3. Y-Code Encryption
         4. Military (M) Code
         5. Civilian Codes
      3. Navigation Data
         1. Ephemeris Parameters
         2. Almanac Information
         3. Clock Correction Data
         4. System Health Status
         5. Ionospheric Parameters
   2. Signal Modulation
      1. Binary Phase Shift Keying (BPSK)
      2. Quadrature Phase Shift Keying (QPSK)
      3. Binary Offset Carrier (BOC)
      4. Multiplexed Binary Offset Carrier (MBOC)
   3. Multiple Access Techniques
      1. Code Division Multiple Access (CDMA)
      2. Frequency Division Multiple Access (FDMA)
      3. Time Division Multiple Access (TDMA)
   4. Signal Acquisition and Tracking
      1. Code Phase Search
      2. Carrier Frequency Search
      3. Signal Correlation
      4. Phase Lock Loops
      5. Delay Lock Loops