Radio communication apparatus

• US 5,251,232 A
• Filed: 11/12/1991
• Issued: 10/05/1993
• Est. Priority Date: 03/06/1991
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Nonami, Takayuki
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): Bocure, Tesfaldet
• Application Number:
  US07/789,905
• Time in Patent Office: 693 Days
• Field of Search: 375/88, 375/5, 375/2, 332/300, 332/117, 329/315, 341/84, 341/88, 341/142, 341/74, 455/84, 455/74, 455/142, 455/88
• US Class Current: 375/216
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04M 1/271 controlled by voice recognition
• CPC Class Codes: H04M 1/724 User interfaces specially adapted for cordless or mobile telephones

Abstract

A radio communication apparatus used for both digital communications and analog communications is disclosed which comprises a digital signal processor DSP (4) which processes many kinds of digital signals according to a plurality of signal procedures (55,56,57,58) stored in the ROM (5). In the present invention, since the radio communication apparatus processes many kinds of procedures (55,56,57,58) stored in the ROM (5), the size of the apparatus becomes small and weight becomes light.

Claims

1. A radio communication apparatus useful for both digital communications and analog communications comprising:

a first linear codec for converting an analog signal to a digital signal, and for converting a digital signal to an analog signal;

a ROM for storing a plurality of signal procedures used for the processing of analog communications and digital communications;

a digital signal processor (DSP) connected to said first linear codec for processing digital signals which are received from and delivered to said first linear codec by said DSP according to said corresponding signal procedures stored in the ROM;

a control portion connected to said DSP for controlling the processing according to signal procedures stored in said ROM of digital signals received from and delivered to said first linear codec for both the analog communications and digital communications of said communications apparatus;

a digital modulation/demodulation portion connected on the opposite side of said DSP from said first linear codec for generating digital modulated signals from digital coded signals delivered to said digital modulation/demodulation portion by said DSP, and for generating coded digital signals to be delivered to said DSP from digital modulated signals received by said digital modulation/demodulation portion;

an FM modulation/demodulation portion for generating analog FM modulated signals from analog modulation signals, and for generating analog demodulated signals from analog FM modulated signals; and

a second linear codec positioned between the DSP and said FM modulation/demodulation portion, for generating said analog modulation input signal to said FM modulation/demodulation portion from digital coded signals received from said DSP, and for generating digital demodulated signals for delivery to said DSP from said analog demodulated signals received from said FM modulation/demodulation portion;

whereby communication signals for both digital communications and analog communications are processed through said DSP in digital form.

2. The radio communication apparatus of claim 1, wherein said ROM includes a voice coding procedure for processing digital signals using said digital modulation/demodulation portion.

3. The radio communication apparatus of claim 1, wherein said ROM includes a voice procedure for processing analog signals using said FM modulation/demodulation portion.

4. The radio communication apparatus of claim 1, wherein said ROM includes a data procedure for processing digital data signals.

5. The radio communication apparatus of claim 1, wherein said ROM includes a voice recognition procedure for processing voice recognition signals.

6. The radio communication apparatus of claim 1, wherein said ROM includes an echo canceling procedure for processing echo canceling signals.