| 摘要 |
A codeless digital method and apparatus for obtaining measured phase from a plurality of L2 signal transmissions. An intermediate frequency signal is derived by mixing (22) the L2 transmissions (16) with a local oscillator (32). That signal is hardlimited (28) and employed to terminate the count of a divide-by-32 counter (30) that is clocked by the local oscillator signal and initiated by a signal in synchronization therewith whose frequency is a fraction (40) of the local oscillator. The state of the counter (30) is applied to a four bit latch (38). The state of the latch, which effectively discards the most significant bit of the count, provides the measured phase of the L2 transmissions from which position can be obtained by reference to the satellite phase and delta range values derived therefrom.
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