Full duplex radio in wireless tunneling system

Patent metadata

Field	Value
Publication number	US-10091026-B2
Application number	US-201615073348-A
Country	US
Kind code	B2
Filing date	Mar 17, 2016
Priority date	Mar 18, 2015
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

Disclosed wireless tunneling system includes two wireless tunneling apparatuses that communicate with each other through the wireless link. A local wireless tunneling apparatus is coupled to a local processing apparatus through a wired connection and a remote wireless tunneling apparatus is coupled to the remote processing apparatus through another wired connection. The two processing apparatuses bi-directionally communicate with each other through the wireless link using the two wireless tunneling apparatuses as if the two processing apparatuses were connected through a wired connection.

First claim

What is claimed is:

1. A full-duplex wireless tunneling apparatus, the wireless tunneling apparatus comprising:
a local transmit antenna having a first polarization, the local transmit antenna configured to transmit an outgoing signal at a carrier frequency;
a local receive antenna having a second polarization different from the first polarization, the local receive antenna configured to receive an incoming signal at the carrier frequency, the incoming signal received concurrently with the transmission of the outgoing signal;
a local wireless transmitter coupled to the local transmit antenna, the local wireless transmitter configured to (i) modulate a carrier signal using on-off keying to generate a local transmit wireless signal centered at the carrier frequency, the carrier signal modulated according to a local transmit baseband signal, the local transmit baseband signal obtained based on an input local data signal from a local source apparatus coupled to the wireless tunneling apparatus, and (ii) transmit the local transmit wireless signal through the local transmit antenna; and
a local wireless receiver coupled to the local receive antenna, the local wireless receiver comprising:
an on-off keying demodulator, the on-off keying demodulator configured to receive a local receive wireless signal centered at the carrier frequency from the local receive antenna concurrently with the local wireless transmitter transmitting the local transmit wireless signal, and demodulate the local receive wireless signal to a local receive baseband signal, and
a clock and data recovery circuit coupled to the on-off keying demodulator, the clock and data recovery circuit to (i) receive the local receive baseband signal, (ii) perform timing recovery on the local receive baseband signal, (iii) recover a digital representation of the local receive baseband signal that is synchronous to a local clock of the recovered digital representation, and (iv) provide a data signal comprising the recovered digital representation to the local source apparatus, the data signal compliant with a wired communication protocol between the local source apparatus and a remote source apparatus.

2. The wireless tunneling apparatus of claim 1 , wherein the local wireless transmitter further comprises:
a wired receiver and timing recovery block configured to receive the input local data signal from the local source apparatus, and to provide a local transmit digital signal that is synchronous to a local clock;
a high frequency transmitting circuit configured to receive the local transmit digital signal according to a first frame structure and a first coding scheme implemented by the wired communication protocol and to recode the local transmit digital signal according to a second frame structure and a second coding scheme implemented by the local wireless transmitter to generate a recoded transmit digital signal; and
a digital to analog converter configured to receive the recoded transmit digital signal and to generate the local transmit baseband signal,
wherein the local wireless receiver further comprises:
a high frequency receiving circuit operating based on a local data clock configured to receive the recovered digital representation, to recode the recovered digital representation according to the first frame structure and the first coding scheme of the wired communication protocol to generate a recoded recovered data signal and to provide the recoded recovered data signal to the local source apparatus.

3. The wireless tunneling apparatus of claim 2 , wherein the high frequency transmitting circuit is configured to pass the local transmit digital signal unmodified, and the high frequency receiving circuit passes the recovered digital representation unmodified.

4. The wireless tunneling apparatus of claim 2 , wherein the local wireless transmitter is configured to perform duobinary encoding on the local transmit data signal to produce a local recoded transmit digital signal with three possible levels, the three levels comprising: a zero level and two non-zero levels with opposite signs.

5. The wireless tunneling apparatus of claim 2 , wherein the high frequency transmitting circuit is configured to perform forward error correction encoding, and the high frequency receiving circuit is configured to perform forward error correction decoding.

6. The wireless tunneling apparatus of claim 1 , wherein the local receive wireless signal comprises a signal component corresponding to a remote data signal compliant with the wired communication protocol.

7. The wireless tunneling apparatus of claim 6 , wherein the signal component corresponds to a remote transmit wireless signal transmitted through a remote transmit antenna having the second polarization.

8. The wireless tunneling apparatus of claim 6 , wherein the signal component corresponds to a remote transmit wireless signal, the remote transmit wireless signal generated by a remote wireless tunneling apparatus according to the remote data signal, the remote wireless tunneling apparatus coupled to the remote source apparatus through a wired connection.

9. The wireless tunneling apparatus of claim 1 , wherein the local source apparatus and the remote source apparatus communicate with each other through the wired communication protocol through a wireless connection between the wireless tunneling apparatus and a remote wireless tunneling apparatus.

10. The wireless tunneling apparatus of claim 1 , wherein a distance between the local transmit antenna and the local receive antenna is less than 15 cm.

11. The wireless tunneling apparatus of claim 1 , wherein a data rate of the data signal is at least 1 Gbps, and the carrier frequency is above 20 GHz.

12. The wireless tunneling apparatus of claim 1 , wherein the on-off keying demodulator comprises an envelope detector without employing a synthesizer to demodulate the local receive wireless signal.

13. The wireless tunneling apparatus of claim 1 ,
wherein the clock and data recovery circuit operates at a first baseband frequency to obtain the data signal compliant with the wired communication protocol, and
wherein the local wireless receiver further comprises a baseband receiving circuit coupled to the on-off keying demodulator, the baseband receiving circuit operating at a second baseband frequency lower than the first baseband frequency to receive the local receive baseband signal and to generate another data signal not compliant with the wired communication protocol based on the local receive baseband signal.

14. A full-duplex transceiver, the full-duplex transceiver comprising: a local wireless transmitter coupled to a local transmit antenna having a first polarization, the local wireless transmitter configured to transmit a local transmit wireless signal through the local transmit antenna at a carrier frequency; and a local wireless receiver coupled to a local receive antenna having a second polarization different from the first polarization, the local wireless receiver configured to receive a local receive wireless signal through the local receive antenna on the carrier frequency, the local wireless receive signal received concurrently with the transmission of the local transmit wireless signal, the local wireless receiver comprising: a demodulator to demodulate a local receive wireless signal to a local receive baseband signal, the local receive wireless signal received from the local receive antenna at the carrier frequency concurrently with the local wireless transmitter transmitting the local transmit wireless signal, and a clock and data recovery circuit coupled to the demodulator, th

Assignees

• Lattice Semiconductor Corp

Inventors

• Forbes Mark Graham
• Cheng Shi
• Cherniavsky Dmitry
• Doan Chinh Huy
• Emami Sohrab
• Ho Ricky Keangpo
• Kumar Nishit
• McElwee Patrick Thomas
• Parker James R
• Singhal Nitesh
• Zeng Ron

Classifications

• H04L27/063

  Superheterodyne receivers · CPC title

• H04L12/4633 Primary

  Interconnection of networks using encapsulation techniques, e.g. tunneling · CPC title

• H04L5/14 Primary

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04L1/0042

  Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape (H04L1/0067 takes precedence) · CPC title

• H04L27/04

  Modulator circuits; Transmitter circuits · CPC title