초록 ▼

A method for reducing the number of required frequency and time hypotheses to acquire an access transmission in a satellite communication system. By reducing the number of required hypotheses, the amount of hardware required to acquire the access transmission is reduced. The method of the present in

A method for reducing the number of required frequency and time hypotheses to acquire an access transmission in a satellite communication system. By reducing the number of required hypotheses, the amount of hardware required to acquire the access transmission is reduced. The method of the present invention reduces the number of required hypotheses by reducing the range of possible frequency and timing values of the access transmission. The range of possible frequency and timing values is reduced by determining the frequency and time uncertainties over individual satellite beams rather than over an entire satellite footprint.

대표청구항 ▼

1. A method for acquiring a signal transmitted by a user terminal to a satellite and relayed by the satellite to a gateway, comprising the steps of:defining an arrival time and frequency search space for a communication beam associated with the satellite based on a predetermined beam coverage area o

1. A method for acquiring a signal transmitted by a user terminal to a satellite and relayed by the satellite to a gateway, comprising the steps of:defining an arrival time and frequency search space for a communication beam associated with the satellite based on a predetermined beam coverage area of said communication beam; searching said search space to resolve a timing and frequency uncertainty associated with the signal; and demodulating a message portion of the signal based on a frequency increment and timing offset obtained as a result of resolving said timing and frequency uncertainty.