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.
2. The device of claim 1 , wherein each filter element of the plurality of filter elements is configured to filter out second harmonics in a defined frequency range.
3. The device of claim 1 , wherein the log periodic filter further comprises:
a first radio frequency (RF) switch; and
a second RF switch, the plurality of filter elements connected between the first RF switch and the second RF switch, wherein the first RF switch and the second RF switch are configured to route a signal through one filter element of the plurality of filter elements based on a frequency of the signal.
4. The device of claim 1 , further comprising:
a transmit/receive switch connected to the antenna and configured to selectively connect to one of the multiband transmitter or the multiband receiver to enable transmission and reception.
5. The device of claim 1 , wherein the multiband transmitter and the multiband receiver are configured to operate using a long range communication network.
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 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;
a low-noise amplifier connected between the multiband receiver and the antenna, the low-noise amplifier configured to amplify signals received by the antenna, including reducing unwanted noise; 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.
9. The device of claim 8 , wherein the low-noise amplifier amplifies a low-power signal from the antenna while minimizing the unwanted noise.
10. The device of claim 8 , wherein the low-noise amplifier provides signal matching using signal matching techniques in radio transmission technology.
11. The device of claim 8 , wherein each filter element of the plurality of filter elements is configured to filter out second harmonics in a defined frequency range.
12. The device of claim 8 , wherein a wide spectrum is divided into sub-bands defined by a starting and ending frequency of each filter element.
13. The device of claim 8 , wherein the multiband transmitter and the multiband receiver are configured to communicate with a plurality of Internet of Things (IoT) devices.
14. 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;
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.
15. The computerized method of claim 14 , wherein each filter element of the plurality of filter elements is configured to filter out second harmonics in a defined frequency range.
16. The computerized method of claim 14 , wherein the determined TVWS channel is selected as having minimal interference.
17. The computerized method of claim 14 , wherein switching to the filter element includes activating the filter element to filter signals communicated by the multi-narrowband transceiver during transmission.
18. The computerized method of claim 14 , wherein switching to the filter element further comprises:
routing a signal through the filter element based on a frequency of the signal.
19. The computerized method of claim 14 , wherein receiving over the TVWS channel further comprises:
amplifying received signals using a low-noise amplifier.
20. The computerized method of claim 19 , wherein amplifying the received signals includes reducing unwanted noise.