Device communication over television white space
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.
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.