IP Library Granted Patent US 8,917,759
Granted Patent B2
US 8,917,759 · App. 13/754,853 · Granted Dec 23, 2014

Transceiver architecture and methods for demodulating and transmitting phase shift keying signals

Inventor: Yang Xu (Chicago, IL)
Assignee: Innophase Inc.
H04L27/2272H04L27/22H04L27/2071
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Quick Facts
Patent No.
US 8,917,759
App. No.
13/754,853
Granted
Dec 23, 2014
Kind
B2
Abstract

A transceiver is described. The transceiver includes a first injection-locked oscillator and a second injection-locked oscillator. The transceiver also includes a first phase-locked loop coupled with the first injection-locked oscillator. The first phase-locked loop is configured to generate a first frequency reference. Further, the transceiver includes a second phase-locked loop coupled the second injection-locked oscillator. The second phase-locked loop is configured to generate a second frequency reference. The transceiver includes a mixer configured to receive the first phase-locked loop output and configured to receive said second injection-locked oscillator output. The mixer is also configured to generate a carrier frequency signal based on the first injection-locked oscillator output and the second injection-locked oscillator output. And, the transceiver includes a modulator configured to receive said carrier frequency signal.

Claims (40)

1. A transceiver comprising:

a first injection-locked oscillator having a first input configured to receive a binary phase shift keying (“BPSK”) signal and a second input configured to receive a first frequency reference, said first injection-locked oscillator configured to generate a first injection-locked oscillator output;

a second injection-locked oscillator having a third input configured to receive said BPSK signal and a fourth input configured to receive a second frequency reference, said second injection-locked oscillator configured to generate a second injection-locked oscillator output;

a first phase-locked loop coupled with said second input of said first injection-locked oscillator, said first phase-locked loop configured to generate said first frequency reference;

a second phase-locked loop coupled with said fourth input of said second injection-locked oscillator, said second phase-locked loop configured to generate said second frequency reference;

a first mixer configured to receive said first injection-locked oscillator output and configured to receive said second injection-locked oscillator output, said mixer configured to generate a carrier frequency signal based on said first injection-locked oscillator output and said second injection-locked oscillator output;

a second mixer configured to receive said first injection-locked oscillator output and configured to receive said second injection-locked oscillator output, said second mixer configured to generate a mixed version of the BPSK signal based on said first injection-locked oscillator output and said second injection-locked oscillator output; and

a modulator configured to receive said carrier frequency signal.

2. The transceiver of claim 1 further comprising: a finite state machine coupled with said first phase-locked loop and coupled with said second phase-locked loop.

3. The transceiver of claim 2 , wherein said finite state machine is coupled with said first phase-locked loop by a control signal.

4. The receiver of claim 3 , wherein said control signal adjusts a divide factor of said first phase-locked loop.

5. The transceiver of claim 1 , wherein said first phase-locked loop and said second phase- locked loop are digital phase-locked loops.

6. The transceiver of claim 1 , wherein said first phase-locked loop and said second phase- locked loop are analog phase-locked loops.

7. The transceiver of claim 1 , further comprising: a quadrature phase shift keying (“QPSK”) decomposition filter coupled with said first injection-locked oscillator and said second injection-locked oscillator.

8. The receiver of claim 1 , wherein said first phase-locked loop is configured to receive a first output of said first injection-locked oscillator and said first reference frequency is based at least on said first output of said first injection-locked oscillator.

9. The receiver of claim 1 , wherein said first frequency reference is greater than a carrier frequency of said BPSK signal and said second frequency reference is less than said carrier frequency of said BPSK signal.

10. A transceiver comprising:

a first injection-locked oscillator having a first input configured to receive a binary phase shift keying (“BPSK”) signal and a second input configured to receive a first resonance frequency control input;

a second injection-locked oscillator having a third input configured of receive said BPSK signal and a fourth input configured to receive a second resonance frequency control input;

a first injection-locked oscillator (“ILO”) control circuit coupled with said second input of said first injection-locked oscillator, said first injection-locked oscillator control circuit configured to generate said first resonance frequency control input;

a second ILO control circuit coupled with said fourth input of said second injection-locked oscillator, said second injection-locked oscillator control circuit configured to generate said second resonance frequency control input;

a first mixer configured to receive a first injection-locked oscillator output and configured to receive a second injection-locked oscillator output, said mixer configured to generate a carrier frequency signal based on said first injection-locked oscillator output and said second injection-locked oscillator output;

a second mixer configured to receive said first injection-locked oscillator output and configured to receive said second injection-locked oscillator output, said second mixer configured to generate a mixed version of the BPSK signal based on said first injection-locked oscillator output and said second injection-locked oscillator output; and

a modulator configured to receive said carrier frequency signal.

11. The transceiver of claim 10 further comprising: a finite state machine coupled with said first ILO control circuit and coupled with said second ILO control circuit.

12. The transceiver of claim 11 , wherein said control signal adjusts a tuning constant of said first injection-locked oscillator control circuit.

13. The transceiver of claim 10 , wherein said modulator is configured to receive a digital bit stream.

14. The transceiver of claim 10 , wherein at least one of said first injection-locked locked oscillator control circuit and said second injection-locked oscillator control circuit is a phase-locked loop.

15. The transceiver of claim 10 , wherein at least one of said first injection-locked oscillator control circuit and said second injection-locked oscillator control circuit is a frequency-locked loop.

16. The transceiver of claim 10 , wherein said first phase-locked loop is configured to receive said first output of said first injection-locked oscillator and said first reference frequency is based at least on said first output of said first injection-locked oscillator.

17. The transceiver of claim 10 , wherein said first resonance frequency control input causes the first ILO to have a resonance frequency greater than a carrier frequency of said BPSK signal and said second resonance frequency control input causes the second ILO to have a resonance frequency less than said carrier frequency of said BPSK signal.

18. A method for demodulating a signal and modulating a baseband signal comprising:

receiving a binary-phase shift keying signal;

generating a first channel based on said binary phase shift keyed signal;

generating a second channel based on said binary phase shift keyed signal;

processing said first channel using a first circuit including a first injection-locked oscillator coupled with first injection-locked oscillator control circuit to generate a first output;

processing said second channel using a second circuit including a second injection-locked oscillator coupled with a second injection-locked oscillator control circuit to generate a second output;

multiplying said first output with said second output to generate a carrier frequency signal;

multiplying said first output with said second output to generate a demodulated version of the binary-phase shift keying signal; and

modulating a baseband signal based on said carrier frequency signal.

Assignments (2)
SECURITY INTEREST Recorded Mar 12, 2018
From: INNOPHASE INC.
To: VENTURE LENDING & LEASING VIII, INC.
Reel/Frame 045567/0796 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 31, 2013
From: XU, YANG
To: INNOPHASE INC.
Reel/Frame 029730/0978 →
Continuity (3)
Provisional Application 61593221 · Jan 31, 2012
Provisional Application 61615169 · Mar 23, 2012
Related Publication 20130195157A1 · Aug 1, 2013