Radio communication apparatus with stored coding/decoding procedures

• US 5,278,866 A
• Filed: 10/11/1991
• Issued: 01/11/1994
• Est. Priority Date: 03/04/1991
• Status: Expired due to Term

• 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): TSE, YOUNG TOI
• Application Number:
  US07/774,855
• Time in Patent Office: 823 Days
• Field of Search: 375/7-8, 375/10, 371/11.1, 371/37.8, 371/5.4-5.5, 371/11.3, 371/21.1, 371/21.2
• US Class Current: 375/227
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0014 by adapting the source coding

Abstract

A radio communication apparatus for transmitting and receiving a digital signal using a radio line which includes a memory means for storing a plurality of signal procedures in which each procedure has different ratio of the information code bits and error correction code bits.

A signal processing circuit executes one of the procedures stored in the memory means according to line quality. Accordingly, the radio communication apparatus of the present invention selects the optimum procedure according to the line quality, and then reduces the consumed power.

Claims

1. A radio communication apparatus for transmitting and receiving a digital signal using a radio line comprising:

a memory means having stored therein a plurality of coding/decoding procedures in which each procedure has a different ratio of the information code bits and error correction code bits;

a signal processing circuit for executing selected ones of said plurality of coding/decoding procedures stored in said memory means;

a line quality monitor for generating line quality information and for supervising said radio line;

a control circuit connected to receive said line quality information from said line quality monitor and to control said signal processing circuit for selecting one of said coding/decoding procedures responsive to the line quality information generated by said line quality monitor to minimize the number of error correction code bits required based on said line quality information and for instructing the execution of the selected coding/decoding procedures by said signal processing circuit.

2. The radio communication apparatus for transmitting and receiving a digital signal using radio line of claim 1, wherein said memory means stores a plurality of voice coding/decoding procedures in which each procedure has different ratio of the voice code bits and error correction code bits.

3. The radio communication apparatus for transmitting and receiving a digital signal using radio line of claim 1, wherein said memory means stores a plurality of data transmission procedures in which each procedure has different ratio of the information code bits and error correction code bits.