초록 ▼

Disclosed is a GPS pseudolite transmitter, receiver and navigation system. The GPS pseudolite transmitter is adapted to transmit a first phase modulated L-band signal at a first signal pulse repetition rate having an associated first period time duration. The first phase modulated L-band signal is m

Disclosed is a GPS pseudolite transmitter, receiver and navigation system. The GPS pseudolite transmitter is adapted to transmit a first phase modulated L-band signal at a first signal pulse repetition rate having an associated first period time duration. The first phase modulated L-band signal is modulated with a short period code having a code epoch of at least about one millisecond. For each consecutive transmission pulse having the first period time duration, the pseudolite transmitter transmits the first phase modulated L-band signal during less than one half of the first period time duration, and for at least about 1 millisecond so that the first pseudolite transmitter transmits an epoch of the short period code during each transmission pulse. A receiver is adapted to receive the first phase modulated L-band signal from the first pseudolite transmitter, at times when it is not integrating phase modulated L-band signals from other GPS pseudolites transmitters, such that cross-correlation with other phase modulated L-band signals is minimized. Furthermore, the receiver is adapted to receive the L-band satellite signal during intervals when no pseudolite signals are being received.

대표청구항 ▼

[ What is claimed is:] [11.] A pseudolite transmitter for use in a global positioning system (GPS) type navigation system, the pseudolite transmitter comprising:an antenna; andsignal generating circuitry coupled to the antenna and adapted to generate and transmit through the antenna a first phase mo

[ What is claimed is:] [11.] A pseudolite transmitter for use in a global positioning system (GPS) type navigation system, the pseudolite transmitter comprising:an antenna; andsignal generating circuitry coupled to the antenna and adapted to generate and transmit through the antenna a first phase modulated L-band signal at a first signal pulse repetition rate, the first phase modulated L-band signal being modulated with a short period code having a code epoch of at least about one millisecond, the first signal pulse repetition rate having a first period time duration associated therewith, wherein for each of a plurality of consecutive transmission intervals having the first period time duration the signal generating circuitry transmits the first phase modulated L-band signal during less than about one half of the first period time duration, and for at least about 1 millisecond so that an epoch of the short period code is transmitted by the pseudolite transmitter during each transmission pulse.