Method and system for dynamic spectrum access using specialty detectors and improved networking
Methods and systems for dynamic spectrum access (DSA) in a wireless network are provided. A DSA-enabled device may sense spectrum use in a region and, based on the detected spectrum use, select one or more communication channels for use. The devices also may detect one or more other DSA-enabled devices with which they can form DSA networks. A DSA network may monitor spectrum use by cooperative and non-cooperative devices, to dynamically select one or more channels to use for communication while avoiding or reducing interference with other devices.
1. In a dynamic spectrum access-enabled device, a method of detecting a non-cooperative signal having a carrier bandwidth of BWcarrier and a signal bandwidth of BWwM, said method comprising:
applying a filter having a bandwidth of BWcarrier to energy detected in a frequency range to obtain a plurality of energy measurements;
determining a maximum energy measurement from the plurality of energy measurements;
determining whether the non-cooperative signal occurs in the frequency range based on the maximum energy measurement by comparing the maximum energy measurement to a threshold;
further comprising performing said step of applying a filter for a period of time at a rate of 1/BWcarrier to obtain a plurality of energy measurements, where BWcarrier is an unmodulated carrier bandwidth of the non-cooperative signal.
2. The method of claim 1 , wherein the non-cooperative signal is a wireless microphone signal.
3. The method of claim 1 , further comprising the step of classifying the availability of a channel for use by the dynamic spectrum access-enabled device based on the presence or absence of a signal in the frequency range.
4. A device comprising:
a detector configured to apply a filter having a bandwidth of BWcarrier to energy detected in a frequency range to obtain a plurality of energy measurements, where BWcarrier is a carrier bandwidth of a non-cooperative signal;
a first circuit configured to determine a maximum energy measurement from the plurality of energy measurements;
a second circuit configured to determine whether the non-cooperative signal occurs in the frequency range based on the maximum energy measurement by comparing the maximum energy measurement to a threshold;
said detector further configured to apply the filter for a period of time at a rate of 1/BWcarrier to obtain a plurality of energy measurements, where BWcarrier is an unmodulated carrier bandwidth of the non-cooperative signal.
5. The device of claim 4 , wherein the non-cooperative signal is a wireless microphone signal.
6. The device of claim 4 , further comprising a dynamic spectrum access-enabled device.
7. The device of claim 4 , wherein said detector provides a sensitivity enhancement of at least about 10-20 dB.
8. The device of claim 4 , said device configured to classify the availability of a channel for use by the device based upon the presence or absence of a signal in the frequency range.
9. A non-transitory computer-readable medium storing a plurality of instructions for execution by a processor, which cause the processor to:
apply a filter having a bandwidth of BWcarrier to energy detected in a frequency range to obtain a plurality of energy measurements, where BWcarrier is a carrier bandwidth of a non-cooperative signal;
determine a maximum energy measurement from the plurality of energy measurements;
determine whether the non-cooperative signal occurs in the frequency range based on the maximum energy measurement by comparing the maximum energy measurement to a threshold;
said instructions further causing the processor to perform said step of applying a filter for a period of time at a rate of 1/BWcarrier to obtain a plurality of energy measurements, where BWcarrier is an unmodulated carrier bandwidth of the non-cooperative signal.
10. The medium of claim 9 , wherein the non-cooperative signal is a wireless microphone signal.
11. The medium of claim 9 , said instructions further causing the processor to classify the availability of a channel for use by the dynamic spectrum access-enabled device based on the presence or absence of a signal in the frequency range.