Method and apparatus for a pulse decoding communication system using multiple receivers

• US 6,650,268 B2
• Filed: 05/23/2002
• Issued: 11/18/2003
• Est. Priority Date: 10/28/1999
• Status: Expired due to Fees

• Current Assignee: National University of Singapore
• Original Assignee: National University of Singapore
• Inventors: Joe, Jurianto, Lye, Kin M.
• Primary Examiner(s): Jean Pierre, Peguy
• Application Number:
  US10/155,827
• Publication Number:
  US 20030006925A1
• Time in Patent Office: 544 Days
• Field of Search: 341/157, 341/133, 341/111, 318/798, 327/514, 330/284, 331/74
• US Class Current: 341/157
• CPC Class Codes: H03K 3/313 by the use, as active elements, of semiconductor devices with two electrodes, one or two potential barriers, and exhibiting a negative resistance characteristic
• CPC Class Codes: H03K 3/315 the devices being tunnel diodes
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04B 1/7174 Pulse generation in general H04L25/03834
• CPC Class Codes: H04B 1/7176 Data mapping, e.g. modulation
• CPC Class Codes: H04L 1/22 using redundant apparatus to increase reliability
• CPC Class Codes: H04L 25/4906 using binary codes

Abstract

A multiple receiver approach is disclosed for a pulse decoding communication system, which can enhance system robustness and increase information carrying capacity. Two or more receivers are used to produce groups of pulses from a received signal. In one embodiment, system robustness is enhanced by redundancy. In another embodiment, information capacity is increased by producing independent groups of pulses from one cycle of an analog waveform.

Claims

1. A method for recovering information from a single cycle of an analog waveform, comprising:

generating pulses from said analog waveform including;

producing a first group of one or more pulses based on a first portion of said single cycle of said analog waveform; and

producing at least a second group of one or more pulses based on a second portion of said single cycle of said analog waveform;

producing one or more first measurements for one or more parameters which characterize said first group of one or more pulses;

producing one or more second measurements for one or more parameters which characterize said second group of one or more pulses; and

producing at least one symbol based on said first and second measurements.

2. The method of claim 1 further including producing a third measurement based on a timing relationship between said first and second groups of pulses, wherein said producing at least one symbol is further based on said third measurement.

3. The method of claim 1 wherein said one or more parameters includes parameters selected from the group consisting of:

a group period (T₁), a pulse width (T₂), a pulse separation (T₃), a silent period (T₄), and number of pulses (N_p).

4. The method of claim 1 further including receiving a transmitted signal and producing said analog waveform from said transmitted signal.

5. The method of claim 1 wherein said producing said first group of one or more pulses includes detecting a first sloped portion of said analog waveform or a first amplitude of said analog waveform.

6. The method of claim 5 wherein said producing said second group of one or more pulses includes detecting a second sloped portion of said analog waveform or a second amplitude of said analog waveform.

7. The method of claim 1 wherein said analog waveform represents at least two symbols and said producing at least one symbol includes producing a first symbol based on said first measurements and a second symbol based on said second measurements.

8. The method of claim 1 wherein said steps are repeated for additional cycles of analog waveforms, thereby producing at least one symbol for each additional cycle of analog waveform.

9. A method for producing information from an analog waveform, said analog waveform having measurements of slope and amplitude, said method comprising:

detecting a first measurement having a first value and in response thereto producing a first group of one or more pulses;

measuring one or more parameters which characterize said first group of pulses to produce one or more third measurements corresponding to said first group of pulses;

detecting a second measurement having a second value and in response thereto producing a second group of one or more pulses;

measuring one or more parameters which characterize said second group of pulses to produce one or more fourth measurements corresponding to said second group of pulses; and

based on said third and fourth measurements, producing at least one symbol.

10. The method of claim 9 wherein said one or more parameters includes parameters selected from the group consisting of:

a group period (T₁), a pulse width (T₂), a pulse separation (T₃), a silent period (T₄), and number of pulses (N_p).

11. The method of claim 9 wherein said steps of detecting are performed on a single cycle of said analog waveform.

12. The method of claim 9 wherein said analog waveform comprises a first portion selected independently from a second portion, said first measurement relating to said first portion, said second measurement relating to said second portion.

13. A circuit system for recovering information from one cycle of an analog waveform, comprising:

a first circuit having an input for receiving said analog waveform, said first circuit responsive to a first measurement of said analog waveform by producing a first group of pulses;

at least a second circuit having an input for receiving said analog waveform, said second circuit being responsive to a second measurement of said analog waveform by producing a second group of one or more pulses; and

a decoder circuit coupled to receive said first and second pulses respectively from said first and second circuits, said decoder configured to produce one or more first parameters which characterize said first group of pulses and to produce one or more second parameters which characterize said second group of pulses produce at least one symbol based on said first and second parameters.

14. The circuit system of claim 13 further incorporated in a communication system.

15. The circuit system of claim 13 wherein said first measurement is a slope or an amplitude of said analog waveform.

16. The circuit system of claim 15 wherein said second measurement is a slope or an amplitude of said analog waveform.

17. The circuit system of claim 13 wherein said decoder circuit is configured to produce a first symbol based on said one or more first parameters and a second symbol based on said one or more second parameters.

18. The circuit system of claim 13 wherein said first and second circuits each is characterized by a transfer function having at least one unstable operating region bounded to by two stable operating regions.

19. The circuit system of claim 13 wherein said one or more first parameters and said one or more second parameters each include parameters selected from the group consisting of:

a group period (T₁), a pulse width (T₂), a pulse separation (T₃), a silent period (T₄), and number of pulses (N_p).