초록 ▼

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 p

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.

대표청구항 ▼

[ What is claimed is:] [1.] A modem development kit, comprising:a programmable modem which receives input data signals and modulates and up-converts said input data signals into first intermediate frequency signals and which demodulates and down-converts second intermediate frequency signals into ou

[ What is claimed is:] [1.] A modem development kit, comprising:a programmable modem which receives input data signals and modulates and up-converts said input data signals into first intermediate frequency signals and which demodulates and down-converts second intermediate frequency signals into output data signals, comprising:an integrated circuit comprising:a transmitter chain which generates first signals at an intermediate frequency, said transmitter chain having a plurality of circuits generating first baseband signals, said transmitter comprising a converter coupled to receive input data and convert said input data into said first baseband signals, a spreader, an over-sampling filter, a gain control, and an up-converter with a programmable frequency which converts said first baseband signals to said first intermediate frequency signals,a receiver chain which generates a plurality of output data signals, said receiver chain having a down-converter with a programmable frequency which converts said second intermediate frequency signals to second baseband signals, a decimating filter, a gain control, and a correlator to convert said second baseband signals into said plurality of output data signals, anda clock generator coupled to said transmitter chain and to said receiver chain, said clock generator having at least one numerically controlled oscillator;a programmable digital signal processor;a field programmable gate array chip;an analog to digital converter; anda digital to analog converter;an external programming device coupled to said programmable modem, to said digital signal processor and to said field programmable gate array, said external programming device providing programming for said digital signal processor, for configuring said field programmable gate array chip, and for said programmable modem;and means for initializing said modem development kit;means for monitoring and means for controlling said modem development kit; andan interface between said external programming device and said programmable modem.