Method and apparatus to recover data from pulses

• US 6,907,090 B2
• Filed: 03/13/2001
• Issued: 06/14/2005
• Est. Priority Date: 03/13/2001
• Status: Expired due to Fees

• Current Assignee: National University of Singapore
• Original Assignee: National University of Singapore
• Inventors: Zhang, Guo Ping
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Pathak, Sudhanshu C.
• Application Number:
  US09/805,854
• Publication Number:
  US 20020131530A1
• Time in Patent Office: 1,554 Days
• Field of Search: 375/340, 375/360, 340/825.57, 370/301, 342/51, 708/819, 341/133, 714/823, 704/222
• US Class Current: 375/340
• CPC Class Codes: H03K 5/1252 Suppression or limitation of noise or interference specially adapted for transmission systems H04B15/00, H04L25/08
• CPC Class Codes: H04L 25/4902 Pulse width modulation; Pulse position modulation

Abstract

Methods and corresponding apparatus to recover data from a signal comprising groups of pulses generated in response to analog waveforms are described. Data recovery in accordance with the invention is based on parameters characterizing the groups of pulses. These parameters are the basis for mapping the groups of pulses to information symbols which collectively constitute the data to be recovered.

Claims

1. A system for recovering data from a signal, said signal comprising a plurality of groups of pulses, the system comprising:

detection means for detecting one of said groups of pulses;

measurement means, coupled to said detection means, for measuring one or more parameters which characterize said one of said groups of pulses; and

symbol means, coupled to said measurement means, for mapping said one or more of said parameters to an information symbol,

said measurement means comprising;

first and second pipelines, each having an input and an output, each configured to produce measurements for two or more groups of pulses, said second pipeline further configured to provide a delay of one group;

a first delay unit coupled to said first pipeline output;

a second delay unit coupled to said second pipeline output; and

a decision component having an input, said first and second delay units coupled to said input,

said first and second delay units configured to provide a delay during processing of said two or more groups of pulses.

2. The system 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 (Np).

3. The system of claim 1 wherein said one or more parameters is based on a timing relationship between said groups of pulses.

4. The system of claim 1 wherein said symbol means for mapping produces said information symbol based on at least two of said parameters.

5. The system of claim 1 wherein said first and second delay units each is configured to provide a variable delay, said variable delay depending on a group period of a group of pulses.