Systems, methods, and apparatuses for spectrum-sensing cognitive radios
First Claim
1. A cognitive radio system, comprising:
- at least one antenna;
a spectrum-sensing module configured to receive a radio frequency (RF) input signal from the at least one antenna and configured to generate analog radio frequency (RF) spectrum usage information, wherein the spectrum-sensing module processes the received RF input signal in an analog domain to generate the analog RF spectrum usage information;
an analog-to-digital converter for digitizing the analog RF spectrum usage information; and
a medium access control (MAC) module operative to receive the digitized RF spectrum usage information from the spectrum-sensing module, wherein the MAC module is operative to direct a frequency of operation of a radio front-end module based at least in part on the received spectrum usage information, wherein the spectrum-sensing module operates in parallel with the radio front-end module such that the spectrum-sensing module and radio front-end module are operative independently of each other.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems, methods, and apparatuses are provided for spectrum-sensing cognitive radios that are operative to detect and utilize available RF spectrum resources. The spectrum-sensing cognitive radios include at least one antenna and a frequency-agile radio front-end module in communication with the at least one antenna and configured to transmit and receive radio frequency signals via the at least one antenna. In addition, a spectrum-sensing module, which may include one or both of coarse-sensing and fine-sensing modules, may be in communication with the at least one antenna and be configured to generate RF spectrum usage information. A medium access control (MAC) module is operative to receive the RF spectrum usage information from the spectrum-sensing module. Based upon the received RF spectrum usage information, the MAC module is operative to direct a frequency of operation of the radio front-end module based at least in part on the received spectrum usage information.
72 Citations
17 Claims
-
1. A cognitive radio system, comprising:
-
at least one antenna; a spectrum-sensing module configured to receive a radio frequency (RF) input signal from the at least one antenna and configured to generate analog radio frequency (RF) spectrum usage information, wherein the spectrum-sensing module processes the received RF input signal in an analog domain to generate the analog RF spectrum usage information; an analog-to-digital converter for digitizing the analog RF spectrum usage information; and a medium access control (MAC) module operative to receive the digitized RF spectrum usage information from the spectrum-sensing module, wherein the MAC module is operative to direct a frequency of operation of a radio front-end module based at least in part on the received spectrum usage information, wherein the spectrum-sensing module operates in parallel with the radio front-end module such that the spectrum-sensing module and radio front-end module are operative independently of each other. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for implementing a cognitive radio system, comprising:
-
receiving radio signals at a spectrum-sensing module; generating via the spectrum-sensing module, analog spectrum information based on processing the received radio signals in an analog domain; digitizing the analog spectrum information; receiving the digitized spectrum information at a medium access control module; determining via the medium access control module, a non-occupied spectrum based at least in part upon the spectrum information; and reconfiguring a transceiver to operate in the non-occupied spectrum, wherein the spectrum-sensing module operates in parallel with the radio front-end module such that the spectrum-sensing module and radio front-end module are operative independently of each other. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A spectrum sensing system, comprising:
-
a coarse-sensing module that applies a wavelet transform to a radio frequency (RF) input signal to generate a signal indicative of spectrum usage, wherein the wavelet transform comprises a plurality of wavelet pulses having a respective wavelet pulse width and carrier frequency, wherein the coarse-sensing module varies at least one of the wavelet pulse width or carrier frequency over a period of time to generate the signal indicative of spectrum usage; a spectrum recognition module in communication with the coarse-sensing module that determines an occupied spectrum segment based at least partially on the signal from the coarse-sensing module; and a fine-sensing module that generates a signal indicative of a feature of a signal type for an occupied spectrum segment identified by the spectrum recognition module. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
Specification