System and method for medium wide band communications by impluse radio

• US 7,027,493 B2
• Filed: 01/18/2001
• Issued: 04/11/2006
• Est. Priority Date: 01/19/2000
• Status: Expired due to Fees

• Current Assignee: Time Domain Corporation (Humatics Corporation)
• Original Assignee: Time Domain Corporation (Humatics Corporation)
• Inventors: Richards, James L.
• Primary Examiner(s): PHU, PHUONG M
• Application Number:
  US09/761,766
• Publication Number:
  US 20010033576A1
• Time in Patent Office: 1,909 Days
• Field of Search: 375/150, 375/147, 375/140, 375/130, 375/259, 375/343, 370/324, 370/280, 370/503
• US Class Current: 375/150
• CPC Class Codes: H04B 2001/6908 using time hopping
• CPC Class Codes: H04L 25/03834 using pulse shaping
• CPC Class Codes: H04L 27/00 Modulated-carrier systems

Abstract

A system and a method for medium wide band communications using impulse radio techniques. The method of transmitting medium wide band signals includes the steps of producing a sinusoidal signal and a train of preferably Gaussian shaped pulses. The method also includes the steps of multiplying the sinusoidal signal by the train of pulses to produce a train of sinusoidal bursts, and transmitting the train of sinusoidal bursts. The center frequency of the transmitted signal consisting of the train of sinusoidal bursts can be controlled by selecting an appropriate frequency of the sinusoidal signal. The bandwidth of the transmitted signal can be controlled by selecting an appropriate width of the pulses in the train of pulses. Information and/or coding modulation can be accomplished by adjusting the time position and/or phase of the sinusoidal bursts.

Claims

1. A method for receiving an impulse radio signal, comprising the steps of:

(a) producing a coding signal;

(b) producing a sinusoidal signal;

(c) producing a train of pulses;

(d) adjusting the phase of said sinusoidal signal using said coding signal to produce a code phase modulated sinusoidal signal;

(e) multiplying said code phase modulated sinusoidal signal by said train of pulses to produce a template signal consisting of a train of code phase modulated sinusoidal bursts; and

(d) cross correlating a received impulse radio signal with said template signal to output a baseband signal.

2. A method for receiving an impulse radio signal, comprising the steps of:

(a) producing a coding signal;

(b) producing a sinusoidal signal;

(c) producing a train of pulses;

(d) adjusting the phase of said sinusoidal signal using said coding signal to produce a code phase modulated sinusoidal signal;

(e) time positioning each pulse of said train of pulses using said coding signal to produce a code position modulated train of pulses;

(f) multiplying said code phase modulated sinusoidal signal by said code position modulated train of pulses to produce a template signal consisting of a train of code phase and position modulated sinusoidal bursts; and

(d) cross correlating a received impulse radio signal with said template signal to output a baseband signal.

3. An impulse radio receiver, comprising:

a sine generator that outputs a sinusoidal signal;

a precision phase adjustor and timing generator that outputs a phase adjustment signal and a trigger signal;

a gate function generator that receives said trigger signal and outputs a train of pulses;

a phase modulator that receives said phase adjustment signal and said sinusoidal signal, and outputs a phase modulated sinusoidal signal;

a multiplier that multiplies said phase modulated sinusoidal signal with said train of pulses and outputs a template signal consisting of a train of phase modulated sinusoidal bursts; and

a cross correlator that cross correlates a received impulse radio signal with said template signal and outputs a baseband signal.

4. The impulse radio receiver of claim 3, wherein said precision phase adjustor and timing generator receives a coding signal and produces said phase adjustment signal and said trigger signal using said coding signal.