US 6,275,544 B1 · Baseband receiver apparatus and method

Abstract

A base band receiver apparatus comprising an RF front end section, a pulse detection unit wherein modulated, ultra-short spread spectrum pulses are detected, and a data recovery unit wherein clock and data recovery from the detected pulses are carried out. The RF front end includes an antenna and circuitry for filtering and amplifying RF signals received by the antenna. The pulse detection unit preferably includes a tunnel diode or Schottky diode which rectifies the incoming voltage signals from the RF front end and provides a power envelope, a high pass filter which removes residual DC offset from the voltage signals, and a comparator which provides threshold voltage detection. The data unit includes a clock recovery function for generating master clock timing information from the detected pulse stream, a phase offset detector for determining delays associated with pulsed data transmission from other non-master networked devices, and a data recovery function for determining digital values for incoming signals according to timing information from the clock recovery function and phase offset information from the phase offset detector.

Claims70

Dependent claims

A base band receiver apparatus, comprising:

(a) an RF front end;
(b) a pulse detector, said pulse detector operatively coupled to said RF front end;
and
(c) a data processing function, said data processing function operatively coupled to said pulse detector, said data processing function including a clock recovery function, a phase offset detector, and a data recovery function, said clock recovery function configured to recover a master clock timing information from said pulse detector.

1 more element

A base band receiver apparatus, comprising:

(a) a front end section, said front end section including an antenna configured to receive short pulse RF signals and convert said RF pulse signals into a voltage pulse stream;
(b) a detector diode envelope detector, said detector diode envelope detector operatively coupled to said front end section, said detector diode envelope detector configured to detect pulses in said voltage pulse stream;
and
(c) a data processing section, said data processing section operatively coupled to said detector diode envelope detector, said data processing section configured to recover timing information from said detected pulses, said data processing section configured to recover phase offset information from said detected pulses according to said timing information, said data processing function configured to recover data from said detected pulses according to said timing information and said phase offset information;
wherein said data processing section comprises a clock recovery function, said clock recovery function comprising:
(a) a pulse sampler, said pulse sampler operatively coupled to said detector diode envelope detector, said pulse sampler configured to sample said detected pulses;
(b) at least one correlator operatively coupled to said pulse sampler, said correlator configured to match said detected pulses with a predetermined pattern representative of a synchronization symbol;
(c) a phase lock element operatively coupled to said detector diode envelope detector;
and
(d) a sync predictor, said sync predictor operatively coupled to said correlator.

7 more elements

A base band spread spectrum receiver apparatus, comprising:

(a) a front end section;
(b) a pulse envelope detector, said pulse envelope detector operatively coupled to said front end, said pulse envelope detector including a detector diode and a high pass filter, said detector diode serially interfaced to said front end and said high pass filter, said detector diode having an anode end operatively coupled to said front end section, said detector diode having a cathode end operatively coupled to said high pass fitter;
and
(c) a data recovery function, said data recovery function operatively coupled to said pulse envelope detector;
wherein said data recovery function comprises a clock recovery function, said clock recovery function comprising:
(a) a pulse sampler, said pulse sampler operatively coupled to said pulse envelope detector, said pulse sampler configured to sample said detected pulses;
(b) at least one correlator operatively coupled to said pulse sample, said correlator configured to match said detected pulses with a predetermined pattern representative of a synchronization symbol;
(c) a phase lock element operatively coupled to said pulse envelope detector;
and
(d) a sync predictor, said sync predictor operatively coupled to said correlator.

7 more elements

Dependencies are inferred from the claim text.

Baseband receiver apparatus and method

Life of this patent

Baseband receiver apparatus and method

Life of this patent

Abstract

Claims70