초록 ▼

A mobile satellite payload 18 and a method for sampling communication signals 26 are provided. The mobile satellite payload 18 uses a plurality of receive radiating elements 24 within a phase array antenna 22 to convert the communication signals 26 to received signals [S(t)]. A plurality of low nois

A mobile satellite payload 18 and a method for sampling communication signals 26 are provided. The mobile satellite payload 18 uses a plurality of receive radiating elements 24 within a phase array antenna 22 to convert the communication signals 26 to received signals [S(t)]. A plurality of low noise amplifiers (LNAs) 28 amplify the received signals [S(t)] to then be received by a plurality of analog-to-digital (A/D) converters 29. The A/D converters 29 transform the received signals [S(t)] into digital baseband signals [S"(t)] .

대표청구항 ▼

What is claimed is: 1. A method of sampling communication signals within a mobile satellite payload having a phase array antenna, receive radiating elements, a plurality of low noise amplifiers (LNAs) and a plurality of analog-to-digital (A/D) converters, comprising: receiving the communication sig

What is claimed is: 1. A method of sampling communication signals within a mobile satellite payload having a phase array antenna, receive radiating elements, a plurality of low noise amplifiers (LNAs) and a plurality of analog-to-digital (A/D) converters, comprising: receiving the communication signals with the receive radiating elements and forming received signals; amplifying said received signals within the plurality of LNAs to form amplified received signals; and downconverting said amplified received signals into digital baseband signals within the plurality of A/D converters by sampling the amplified received signals at a predetermined sampling frequency fs using A/D converters with an aperture time of 1/(A*fs), where A is a constant related to the A/D converters. 2. A method as in claim 1 further comprising filtering the amplified received signals within the plurality of A/D converters. 3. A method as in claim 1 further comprising sampling the amplified received signals at properly predetermined sampling rates. 4. A method as in claim 1 further comprising maintaining the accuracy of said plurality of A/D converters aperture times (α). 5. A method as in claim 1 further comprising sampling the received signals at frequencies selected from the following group: super high frequency band (SHF), L-band, S-band, and C-band and frequency bands above C band. 6. A method as in claim 1 further comprising automatically filtering said received signals within the plurality of A/D converters. 7. A mobile satellite payload comprising: a phase array antenna, wherein said phase array antenna comprises a plurality of receive radiating elements for forming received signals; a plurality of low noise amplifiers (LNAs) electrically coupled to said receive radiating elements for amplifying the received signals to form amplified received signals; and a plurality of analog-to-digital (A/D) converters electrically coupled to said LNAs, wherein said plurality of A/D converters downconverting said amplified received signals into digital baseband signals by sampling the amplified received signals at a predetermined sampling frequency fs using A/D converters with an aperture time of 1/(A*fs), where A is a constant related to the A/D converters. 8. A system as in claim 7 wherein said plurality of A/D converters incorporate the function of a filter. 9. A system as in claim 7 wherein said plurality of A/D converters operates with various aperture times. 10. A system as in claim 7 wherein said plurality of A/D converters are able to perform as low pass or band pass filters. 11. A system as in claim 7 wherein said plurality of A/D converters are able to sample at different predetermined sampling rates. 12. A communication system comprising: an antenna for receiving a received signal; a low noise amplifier (LNA) electrically coupled to said antenna for amplifying the received signal to form an amplified received signal; and an analog-to-digital (A/D) converter electrically coupled to said LNA, wherein said A/D converter downconverts the amplified received signal into a digital baseband signal by sampling the amplified received signals at a predetermined sampling frequency fs using a A/D converter with an aperture time of 1/(A*fs), where A is a constant related to the A/D converter. 13. A method of sampling communication signals within a mobile satellite payload having a phase array antenna, receive radiating elements, a plurality of low noise amplifiers (LNAs) and a plurality of analog-to-digital (A/D) converters, comprising: receiving the communication signals through the use of the receive radiating elements and forming received signals; amplifying said received signals within the plurality of LNAs to form amplified received signals; downconverting said amplified received signals within the plurality of A/D converters; sampling said amplified received signals within the plurality of A/D converters at a predetermined sampling frequency fs using A/D converters with an aperture time of 1/(A*fs), where A is a constant related to the A/D converters; filtering said amplified received signals within the plurality of A/D converters; wherein the combination of downconverting, sampling, and filtering said received signals transforms said amplified received signals into digital baseband signals. 14. A method as in claim 13 wherein sampling said amplified received signals comprises maintaining the accuracy of said plurality of A/D converters aperture times (α). 15. A method as in claim 13 wherein sampling said amplified received signals comprises sampling the amplified received signals at properly predetermined sampling rates.