High dynamic range transceiver

• US 9,325,433 B2
• Filed: 11/18/2013
• Issued: 04/26/2016
• Est. Priority Date: 02/06/2010
• Status: Active Grant

• Current Assignee: Ultrawave Labs, Inc.
• Original Assignee: Ultrawave Labs, Inc.
• Inventors: Ismail, Aly Mamdouh, Carr, Francis, Kwok, Sai
• Primary Examiner(s): Brainard, Timothy A
• Application Number:
  US14/082,504
• Publication Number:
  US 20140072072A1
• Time in Patent Office: 890 Days
• Field of Search: 375/269, 375/285
• US Class Current: 1/1
• CPC Class Codes: H04B 1/525 with means for reducing leakage of transmitter signal into the receiver
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04L 27/02 Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation H04L27/32 takes precedence

Abstract

This invention uses one or more cancellation modules to eliminate the transmitter leakage at the output of the receive antenna and prior the receiver circuitry so that the received signals can be analyzed without degradation in quality due to simultaneous operation of the transmitter and receiver. Each cancellation circuit could be limited to only 30-50 dB of rejection due to component mismatches and other circuit non-idealities. To obtain further cancellation, more than one cancellation circuit can be applied after the first low noise amplifier. The output of the low noise amplifier can be repeatedly mixed with additional cancellation signals “n” number of times such that the “n” low noise amplifier is mixed with the “n^th” cancellation signal. For each additional cancellation signal added a 20-30 dB reduction in noise may be achieved such that cascading three or four cancellation signals from cancellation modules may produce a 150 dB gain.

Claims

1. A communication system, comprising:

a transmitter connected to a first antenna;

an amplitude phase shift module having a first input connected to the transmitter, a second input connected to a processor and an output connected to a combiner;

a receiver connected to the combiner;

a first power and phase detector module, connected to the output of the amplitude phase shift module, that samples the output of the amplitude phase shift module in order to generate a first set of phase and amplitude data and sending the first phase and amplitude data to the processor; and

a second power and phase detector module connected to the processor and a second antenna where the second power and phase detector module that samples received signals from the second antenna in order to generate a second set of phase and amplitude data and sending the second set of phase and amplitude data to the processor for generating and sending an adjustment feedback signal to the amplitude phase shift module enabling the amplitude phase shift detector to modify its output to the combiner such that the receiver gets the received signals without transmit leakage.

2. The communication system of claim 1, further including a frequency source connected to the transmitter.

3. The communication system of claim 2, where the frequency source is an oscillator.

4. The communication system of claim 2, where the frequency source is a temperature controlled oscillator.

5. The communication system of claim 1, where the first set of phase and amplitude data comprises analog signals.

6. The communication system of claim 1, where the first set of phase and amplitude data comprises digital data.

7. The communication system of claim 1, where the second set of phase and amplitude data comprises analog signals.

8. The communication system of claim 1, where the second set of phase and amplitude data comprises digital signals.

9. The communication system of claim 1, where the first antenna is a RF antenna.

10. The communication system of claim 1, where the second antenna is a RF antenna.

11. A communication system, comprising:

a transmitting antenna and a receiving antenna;

an amplitude phase shift module connected to the transmitting antenna, a processor and the receiving antenna;

a first power and phase detector connected to an output on the amplitude phase shift module and to an input on the processor;

a second power and phase detector module connected to the receiving antenna and the input on the processor; and

a receiver connected to the output of the amplitude phase shift module and the receiving antenna such that received signals from the second antenna, when combined with the output from the amplitude phase shift module, produces an input signal to the receiver comprising received signals, but no transmit leakage.

12. The communication system of claim 11, where the amplitude phase shift module modifies its output signal based on the input of a transmitted signal from the transmitting antenna and the received signal from the receiving antenna.

13. The communication system of claim 12, where the modified output signal removes transmit leakage of the received signal.

14. The communication system of claim 12, where the first and second power and phase detectors measures and sends to the processor output data regarding the transmitted and received signals respectively.

15. The communication system of claim 14, where the processor uses the output data from the first and second power and phase detectors to generate a modification signal that is sent by the processor to the amplitude phase shift module.

16. The communication system of claim 15, where the amplitude phase shift module modifies the transmitted signal such that the output signal from the amplitude phase shift module when combined with the received signal produces a signal comprising received signals without transmit leakage.

17. A communication system, comprising:

transmitting signals from a transmitting antenna;

receiving signals by a receiving antenna;

measuring the amplitude and phase of the received signals;

generating bleeded signals from the transmitting antenna;

performing a cancellation process on the bleeded signals using the amplitude and phase of the received signals to remove transmit leakage of the received signals;

creating an output signal from the removal of the transmit leakage of the received signals;

transmitting the output signal to a receiver

measuring the amplitude and phase of the received signals thus creating amplitude and phase data from the received signals;

measuring the amplitude and phase of the bleeded signals thus creating amplitude and phase data from the bleeded signals;

processing the measured amplitude and phase data from the received and bleeded signals by a processor thus creating adjustment data;

modifying the bleeded signals by the adjustment data so that transmit leakage of the received signals are removed; and

combining the modified bleeded signals with the received signals.