초록 ▼

A dual-mode communications processor disposed to be incorporated within a dual-mode communications device is disclosed herein. The dual-mode communications processor comprises a dual-mode voiceband signal processor having an input port for receiving digitized data. Within the dual-mode voiceband sig

A dual-mode communications processor disposed to be incorporated within a dual-mode communications device is disclosed herein. The dual-mode communications processor comprises a dual-mode voiceband signal processor having an input port for receiving digitized data. Within the dual-mode voiceband signal processor, first and second signal processing operations are performed upon the digitized data received during operation in first and second modes, respectively. These separate signal processing operations may advantageously be performed using common circuit elements within the dual-mode voiceband signal processor. In an exemplary embodiment the first signal processing operation is performed in accordance with a predefined vocoding algorithm, while the second signal processing operation involves the filtering of the digitized data as prescribed by FM cellular telephone standards. The dual-mode communications processor further includes a digital modulation modem coupled to the dual-mode voiceband signal processor. The digital modulation modem generates digital modulation data using the digitized data processed by the dual-mode voiceband signal processor during operation in the first mode. An FM modulator, also coupled to the dual-mode voiceband signal processor, generates FM modulation data using the digitized data processed by the dual-mode voiceband signal processor during operation in the second mode. A controller is provided for selecting between operation in the first and second modes. A dual-mode port allows the digitized data to be transferred to and from a dual-mode interface buffer over a common signal path during operation in both the first and second modes.

대표청구항 ▼

[ What is claimed is:] [1.] A dual-mode communications processor comprising:a dual-mode signal processor having an input port for receiving digitized data, said signal processor performing first and second signal processing operations upon said digitized data received during operation in first and s

[ What is claimed is:] [1.] A dual-mode communications processor comprising:a dual-mode signal processor having an input port for receiving digitized data, said signal processor performing first and second signal processing operations upon said digitized data received during operation in first and second modes, respectively, said signal processor alternating between said first and second signal processing operations when in a hybrid mode;a digital modulation network, coupled to said dual-mode signal processor, for generating digital modulation data using said digitized data processed by said dual-mode signal processor during said first mode;a narrowband modulator, coupled to said dual-mode signal processor, for generating narrowband modulation data using said digitized data processed by said dual-mode signal processor during said second mode; anda controller for selecting between operation in said first and second modes.