System and method for wave damping

• US 7,924,936 B2
• Filed: 05/25/2007
• Issued: 04/12/2011
• Est. Priority Date: 06/19/2006
• Status: Expired due to Fees

• Current Assignee: Vislink Technologies, Inc.
• Original Assignee: xG Technology, Inc.
• Inventors: Khan, Nadeem, Bobier, Joseph A.
• Primary Examiner(s): Payne; David C.
• Assistant Examiner(s): Haider; Syed
• Application Number:
  US11/807,036
• Publication Number:
  US 20070291892A1
• Time in Patent Office: 1,418 Days
• Field of Search: 375/133, 375/139, 375/146, 375/230, 375/237, 375/242, 375/268, 375/270, 375/271, 375/275, 375/295, 375/335, 375/346, 375/348, 375/350, 375/377, 342/13, 342/21, 342/27, 342/159, 342/201, 333/18, 333/100, 333/173, 333/193, 333/196
• US Class Current: 375/270
• CPC Class Codes: H03H 9/6489 Compensation of undesirable effects
• CPC Class Codes: H03J 1/00 Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
• CPC Class Codes: H04B 1/0458 Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages matching circuits in general H03H
• CPC Class Codes: H04B 1/717 Pulse-related aspects
• CPC Class Codes: H04B 1/7172 Pulse shape in general H04L25/03834
• CPC Class Codes: H04B 1/719 Interference-related aspects

Abstract

A system and method of damping the ringing response of Band Pass Filters for use in impulse and single cycle modulation systems which are capable of carrying a high data rate and which are severely affected by the ringing response of the Band Pass Filter.

Claims

1. A method of damping the ringing response of band pass filters for use in impulse and integer cycle modulation system transmitters comprising switching on and off at repeating intervals that are synchronized with a continuously generated impulse signal and band pass filter propagation delays, the ringing response generated from a band pass filter after said band pass filter receives said continuously generated impulse signal by opening the output of said band pass filter or filters, shunting the output to the input of said band pass filter or filters, or shunting the output of said band pass filter or filters to ground wherein said shunting is synchronized with said continuously generated impulse signal and band pass filter propagation delays, such that the in band ringing response of said band pass filters are removed and only main lobes of said impulse signal remains and all unnecessary in band information between said main lobes is removed resulting in narrow band transmissions.

2. A system of damping the ringing response of band pass filters for use in impulse and single cycle modulation system transmitters comprising:

an impulse signal generator generating continuous impulse signals;

a timing device in electrical communication with said impulse signal generator and a switching device said timing device generating timing pulses that are synchronized with the continuously generated impulse signal and band pass filter propagation delays and said timing pulses controlling said switching device; and

,

said switching device turning on and off at the desired time the ringing response generated from a band pass filter, after said band pass filter receives said continuous impulse signal inputs from said impulse signal generator, by opening the output of said band pass filter or filters, shunting the output to the input of said band pass filter or filters, or shunting the output of said band pass filter or filters to ground wherein said shunting is synchronized with said continuously generated impulse signal and band pass filter propagation delays by said timing pulses of said timing device such that the in band ringing response of said band pass filters are removed and only main lobes of said impulse signal remains and all unnecessary in band information between said main lobes is removed resulting in narrow band transmissions.

3. The system of claim 2 wherein said switching device is in series with and after all of said band pass filters.

4. The system of claim 2 wherein said switching device is in series with and after each of said band pass filters.

5. The system of claim 2 wherein said switching device is in parallel with all of said band pass filters.

6. The system of claim 2 wherein said switching device is in parallel with each of said band pass filters.

7. The system of claim 2 wherein said timing device is implemented in programmable logic circuits such that the system is software controlled and the propagation delay and pulse width of said timing pulses can easily be modified to match changes to the modulation system.