초록 ▼

A universal modem has a software-configurable modulator/demodulator which commodates different modulation formats such as those associated with terrestrial, cable, phone line, satellite and wireless communications to be transmitted and received through a single device in which the modem has reconfig

A universal modem has a software-configurable modulator/demodulator which commodates different modulation formats such as those associated with terrestrial, cable, phone line, satellite and wireless communications to be transmitted and received through a single device in which the modem has reconfigurable logic to accommodate the format of the signals being received or transmitted. Note that the modulator or demodulator can be used separately or the two units can be combined and used for transceivers, with either the same software configuring both the modulator and demodulator, or with different software used for the two units. In the receive mode, the universal modem detects the modulation format of the incoming signal and reconfigures the logic of its software-configurable demodulator to output demodulated digital data for further processing. In the transmit mode, information to be transmitted is provided with the appropriate modulation format by setting a software-configurable modulator in the universal modem to the particular format. In one embodiment, in the receive mode the incoming signal is A-D converted, with a host processor utilized to detect the type of modulation associated with the incoming signal and through a configuration controller configures a random access memory which is coupled to the software-configurable demodulator. In advanced television applications, the demodulated signal is passed through an equalizer, a Trellis Decoder and Reed-Solomon Decoder to provide an appropriate filtered and level-adjusted digital signal that is coupled to the next processing stage.

대표청구항 ▼

[ What is claimed is:] [1.] A universal modem to accommodate different modulation formats for use in the modulation and demodulation of a signal, comprising:a modulator and demodulator having software-configurable logic means for providing modulation and demodulation of a signal, said software confi

[ What is claimed is:] [1.] A universal modem to accommodate different modulation formats for use in the modulation and demodulation of a signal, comprising:a modulator and demodulator having software-configurable logic means for providing modulation and demodulation of a signal, said software configurable logic means including functional hardware blocks, each performing a predetermined function, and means for selectively interconnecting said hardware blocks;means for generating, as an output, configuration instructions for said software-configurable logic means; and,means for coupling said output to said software configurable logic means to configure said modem for the modulation format specified by said configuration instructions by interconnecting said hardware blocks to correspond to said instructions.