Programmable modem apparatus for transmitting and receiving digital data, design method and use method for the modem
First Claim
Patent Images
1. A signal receiving system comprising:
- a receiver chain with a down-converter, a receiver filter, and a gain control;
a receiver chain clock generator coupled to said receiver chain;
means for programming said receiver chain and said clock generator; and
a processor programmed to selectively complete pilot demodulation, traffic demodulation and noise estimation on signals received from the receiver chain.
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Abstract
The programmable modem for digital data of the present invention provides a highly programmable, digital modem implemented in an integrated circuit which can be customized to specific applications. The programmable modem uses spread spectrum techniques and is specifically programmable to alter the parameters of the modem to improve performance. The present invention also provides a systematic method and development kit to provide rapid customization of a modem for a particular application or for rapid specification of a high-performance application specific integrated circuit mode.
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Citations
27 Claims
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1. A signal receiving system comprising:
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a receiver chain with a down-converter, a receiver filter, and a gain control;
a receiver chain clock generator coupled to said receiver chain;
means for programming said receiver chain and said clock generator; and
a processor programmed to selectively complete pilot demodulation, traffic demodulation and noise estimation on signals received from the receiver chain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A customizable signal receiving system comprising:
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a programmable receiver chain with a down-converter, a receiver filter, and a gain control;
a programmable receiver chain clock generator coupled to said receiver chain; and
a programmable processor configured to selectively complete at least one of pilot demodulation, traffic demodulation and noise estimation on signals received from the receiver chain. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A customizable signal receiving system comprising:
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a receiver chain with a down-converter, a receiver filter, and a gain control;
a receiver chain clock generator coupled to said receiver chain;
means for programming said receiver chain and said clock generator; and
a processor programmed to selectively complete pilot demodulation, traffic demodulation and noise estimation on signals received from the receiver chain, wherein pilot information resulting from the pilot demodulation is selectively discarded.
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23. A customizable signal receiving system comprising:
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a receiver chain with a down-converter, a receiver filter, and a gain control;
a receiver chain clock generator coupled to said receiver chain;
means for programming said receiver chain and said clock generator; and
a processor programmed to selectively complete pilot demodulation, traffic demodulation and noise estimation on signals received from the receiver chain, wherein pilot information resulting from the pilot demodulation is used for synchronization purposes.
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24. A customizable signal receiving system comprising:
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a receiver chain with a down-converter, a receiver filter, and a gain control;
a receiver chain clock generator coupled to said receiver chain;
means for programming said receiver chain and said clock generator having a clock frequency memory; and
a processor programmed to selectively synchronize pilot demodulation, traffic demodulation and noise estimation of signals received from the receiver chain by calculating control values for the clock frequency memory. - View Dependent Claims (25, 26, 27)
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Specification