Device communication over television white space

Patent metadata

Field	Value
Publication number	US-11405792-B2
Application number	US-202017037389-A
Country	US
Kind code	B2
Filing date	Sep 29, 2020
Priority date	May 15, 2020
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

The disclosure described herein configures a multi-narrowband transceiver for communication within the television white space (TVWS) frequency spectrum using a log periodic filter, wherein the log periodic filter comprises a plurality of filter elements each having a filter frequency increasing periodically in a same frequency increasing factor (K). Each filter of the plurality of filter elements is configured to filter out second harmonics in a defined frequency range. The disclosure determines a TVWS channel for the communication and switches to a filter element of the plurality of filter elements corresponding to the determined TVWS channel. Data is transmitted and/or received over the TVWS channel using the filter element, thereby allowing narrowband communication over the TVWS channel.

First claim

What is claimed is:

1. A device for television white space (TVWS) communication, the device comprising:
a multiband transmitter and a multiband receiver;
an antenna, the multiband transmitter and the multiband receiver connected to the antenna and configured to transmit and receive at a plurality of TVWS frequencies; and
a log periodic filter connected between the multiband transmitter and the antenna, the log periodic filter comprising a plurality of filter elements each having a filter frequency increasing periodically in a same frequency increasing factor, each filter of the plurality of filter elements configured to filter out second harmonics in a defined frequency range.

2. The device of claim 1 , wherein the plurality of filter elements is configured to filter out second harmonics in a frequency range of 150 MHz to 960 MHz.

3. The device of claim 1 , wherein the plurality of filter elements comprises only five filter elements.

4. The device of claim 3 , wherein the frequency increasing factor is 1.45.

5. The device of claim 1 , wherein the multiband transmitter and the multiband receiver are configured to operate using a long range communication protocol.

6. The device of claim 1 , further comprising a low-noise amplifier (LNA) connected between the multiband receiver and the antenna.

7. The device of claim 1 , wherein the multiband transmitter and the multiband receiver are configured to perform Internet of Things (IoT) communications.

8. A computerized method for television white space (TVWS) communication, the computerized method comprising:
configuring a multi-narrowband transceiver for communication within a TVWS frequency spectrum using a log periodic filter, the log periodic filter comprising a plurality of filter elements each having a filter frequency increasing periodically in a same frequency increasing factor, each filter of the plurality of filter elements configured to filter out second harmonics in a defined frequency range;
determining a TVWS channel for the communication;
switching to a filter element of the plurality of filter elements corresponding to the determined TVWS channel; and
at least one of transmitting and receiving over the TVWS channel using the filter element.

9. The computerized method of claim 8 , wherein the plurality of filter elements comprises only five filter elements.

10. The computerized method of claim 9 , wherein the frequency increasing factor is 1.45.

11. The computerized method of claim 9 , wherein the plurality of filter elements is configured to filter out second harmonics in a frequency range of 150 MHz to 960 megahertz (MHz).

12. The computerized method of claim 8 , wherein the multi-narrowband transceiver is configured to operate using a long range communication protocol.

13. The computerized method of claim 8 , wherein the multi-narrowband transceiver is configured to perform Internet of Things (IoT) communications.

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Shi Heping
• Chandra Ranveer
• Chakraborty Tusher
• Priyantha Nissanka Arachchige Bodhi
• Kapetanovic Zerina
• Vu Binh Ngoc

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title

• H03F2200/294

  the amplifier being a low noise amplifier [LNA] · CPC title

• H04B1/38 Primary

  Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving · CPC title

• H04B15/02 Primary

  Reducing interference from electric apparatus by means located at or near the interfering apparatus · CPC title