Communication apparatus

• US 20100232454A1
• Filed: 03/10/2010
• Published: 09/16/2010
• Est. Priority Date: 03/12/2009
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Kumazawa, Hidehiko
• Application Number:
  US12/661,065
• Publication Number:
  US 20100232454A1
• Time in Patent Office: Days
• US Class Current: 370/477
• CPC Class Codes: H04L 25/4917 using multilevel codes
• CPC Class Codes: H04L 5/04 the signals being represented by different amplitudes or polarities, e.g. quadriplex

Abstract

A communication apparatus includes a transmitter device and a receiver device connected to the transmitter device through a communication line. The transmitter device generates a multiplexed binary signal by adding together N types of binary signals having the same amplitude at a low level and different amplitudes at a high level, where N is an integer more than 1. The receiver device receives the multiplexed binary signal and translates the multiplexed binary signal into the N types of binary signals. One of the N types of binary signals has the minimum amplitude of all the N types of binary signals at the high level. An amplitude of each of the N types of binary signals is defined as a product of the minimum amplitude and 2^M-1, where M is an integer from 1 to N.

Claims

1. A communication apparatus comprising:

a transmitter device configured to generate a multiplexed binary signal by adding N types of binary signals having the same amplitude at a low level and different amplitudes at a high level, where N is an integer more than 1;

a receiver device configured to receive the multiplexed binary signal and translate the multiplexed binary signal into the N types of binary signals; and

a communication line configured to connect the transmitter device and the receiver device, wherein

one of the N types of binary signals has the minimum amplitude of all the N types of binary signals at the high level, and

an amplitude of each of the N types of binary signals at the high level is defined as a product of the minimum amplitude and 2^M-1, where M is an integer from 1 to N.

2. The communication apparatus according to claim 1, wherein

the receiver device compares an amplitude of the multiplexed binary signal with a threshold and translates the multiplexed binary signal into the N types of binary signals based on the result of the comparison.

3. The communication apparatus according to claim 2, wherein

the threshold comprises (2^N-1) different values.

4. The communication apparatus according to claim 1, wherein

the multiplexed binary signal is in the form of an electric current or voltage.

5. The communication apparatus according to claim 1, wherein

each of the transmitter device and the receiver device is mounted on a vehicle, and

the N types of binary signals includes a command or a response to the command.

6. The communication apparatus according to claim 1 further comprising:

a sensor unit mounted on a vehicle and configured to detect a collision of the vehicle; and

an occupant protection unit mounted on the vehicle and configured to protect an occupant of the vehicle based on a detection result of the sensor unit, wherein

the N types of binary signals includes the detection result.

7. A communication apparatus comprising:

a transmitter device configured to successively transmit a plurality of types of binary signals having the same amplitude at a low level and different amplitudes at a high level; and

a receiver device configured to successively receive the plurality of types of binary signals from the transmitter device; and

a communication line configured to connect the transmitter device and the receiver device, wherein

the receiver device determines a type of the binary signal based on the amplitude of the binary signal at the high level.

8. The communication apparatus according to claim 7, wherein

each of the transmitter device and the receiver device is mounted on a vehicle, and

the plurality of types of binary signals includes a command or a response to the command.

9. The communication apparatus according to claim 7, further comprising:

a sensor unit mounted on a vehicle and configured to detect a collision of the vehicle; and

an occupant protection unit mounted on the vehicle and configured to protect an occupant of the vehicle based on a detection result of the sensor unit, wherein

the plurality of types of binary signals includes the detection result.